/usr/bin/java -Xmx15000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/threadmodular/regression/inc-dec-eq0-locked-assert/ThreadModularVerifier.Settings.epf -tc ../../../trunk/examples/threadmodular/regression/ThreadModularUniHorn.xml -i ../../../trunk/examples/threadmodular/regression/inc-dec-eq0-locked-assert/inc-dec-eq0-locked-assert.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.sleep-threadmodular-3a8dd60-m [2023-06-12 17:59:01,391 INFO L172 SettingsManager]: Resetting all preferences to default values... [2023-06-12 17:59:01,448 INFO L100 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/inc-dec-eq0-locked-assert/ThreadModularVerifier.Settings.epf [2023-06-12 17:59:01,456 INFO L114 SettingsManager]: Preferences different from defaults after loading the file: [2023-06-12 17:59:01,457 INFO L135 SettingsManager]: Preferences of ChcSolver differ from their defaults: [2023-06-12 17:59:01,457 INFO L137 SettingsManager]: * Produce UNSAT core if query is UNSAT=true [2023-06-12 17:59:01,457 INFO L135 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-06-12 17:59:01,458 INFO L137 SettingsManager]: * Size of a code block=OneNontrivialStatement [2023-06-12 17:59:01,458 INFO L137 SettingsManager]: * Add additional assume for each assert=false [2023-06-12 17:59:01,462 INFO L135 SettingsManager]: Preferences of IcfgToChc differ from their defaults: [2023-06-12 17:59:01,462 INFO L137 SettingsManager]: * Specification mode=ASSERT_VIOLATIONS [2023-06-12 17:59:01,463 INFO L135 SettingsManager]: Preferences of ChcSmtPrinter differ from their defaults: [2023-06-12 17:59:01,463 INFO L137 SettingsManager]: * Save file in source directory=true [2023-06-12 17:59:01,464 INFO L137 SettingsManager]: * Use automatic naming=true [2023-06-12 17:59:01,464 INFO L137 SettingsManager]: * File name=CHC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-06-12 17:59:01,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-06-12 17:59:01,677 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-06-12 17:59:01,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-06-12 17:59:01,679 INFO L270 PluginConnector]: Initializing Boogie PL CUP Parser... [2023-06-12 17:59:01,680 INFO L274 PluginConnector]: Boogie PL CUP Parser initialized [2023-06-12 17:59:01,680 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/inc-dec-eq0-locked-assert/inc-dec-eq0-locked-assert.bpl [2023-06-12 17:59:01,681 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/inc-dec-eq0-locked-assert/inc-dec-eq0-locked-assert.bpl' [2023-06-12 17:59:01,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-06-12 17:59:01,697 INFO L133 ToolchainWalker]: Walking toolchain with 8 elements. [2023-06-12 17:59:01,698 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-06-12 17:59:01,698 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-06-12 17:59:01,698 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-06-12 17:59:01,710 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:01,710 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:01,713 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:01,714 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:01,715 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:01,715 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:01,716 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:01,716 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:01,717 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-06-12 17:59:01,718 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-06-12 17:59:01,718 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-06-12 17:59:01,718 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-06-12 17:59:01,719 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:01,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-06-12 17:59:01,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-06-12 17:59:01,739 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-06-12 17:59:01,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2023-06-12 17:59:01,768 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2023-06-12 17:59:01,769 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2023-06-12 17:59:01,769 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2023-06-12 17:59:01,800 INFO L236 CfgBuilder]: Building ICFG [2023-06-12 17:59:01,801 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-06-12 17:59:01,804 WARN L818 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-06-12 17:59:01,846 INFO L277 CfgBuilder]: Performing block encoding [2023-06-12 17:59:01,852 INFO L294 CfgBuilder]: Using library mode [2023-06-12 17:59:01,852 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-06-12 17:59:01,854 INFO L201 PluginConnector]: Adding new model inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 05:59:01 BoogieIcfgContainer [2023-06-12 17:59:01,854 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-06-12 17:59:01,854 INFO L112 PluginConnector]: ------------------------IcfgToChc---------------------------- [2023-06-12 17:59:01,854 INFO L270 PluginConnector]: Initializing IcfgToChc... [2023-06-12 17:59:01,855 INFO L274 PluginConnector]: IcfgToChc initialized [2023-06-12 17:59:01,856 INFO L184 PluginConnector]: Executing the observer IcfgToChcObserver from plugin IcfgToChc for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 05:59:01" (1/1) ... [2023-06-12 17:59:02,026 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;lock := false;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,028 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,030 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,031 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,033 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,035 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,036 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,038 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,040 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,042 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,043 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and '<[ dummy edge: assume true; ]>' is: true [2023-06-12 17:59:02,062 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;lock := false;' and 'assume !lock;lock := true;' is: false [2023-06-12 17:59:02,064 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume !lock;lock := true;' is: true [2023-06-12 17:59:02,066 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume !lock;lock := true;' is: true [2023-06-12 17:59:02,067 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume !lock;lock := true;' is: true [2023-06-12 17:59:02,069 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume !lock;lock := true;' is: true [2023-06-12 17:59:02,071 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume !lock;lock := true;' is: true [2023-06-12 17:59:02,075 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume !lock;lock := true;' is: true [2023-06-12 17:59:02,077 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume !lock;lock := true;' is: true [2023-06-12 17:59:02,079 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume !lock;lock := true;' is: true [2023-06-12 17:59:02,080 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'assume !lock;lock := true;' is: true [2023-06-12 17:59:02,082 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume !lock;lock := true;' is: true [2023-06-12 17:59:02,091 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;lock := false;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,095 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,098 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,099 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,101 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,103 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,105 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,107 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,109 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,111 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,113 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,121 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;lock := false;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,123 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,125 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,126 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,146 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,148 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,149 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,151 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,153 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,155 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,156 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,163 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;lock := false;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,165 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,166 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,168 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,169 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,171 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,172 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,174 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,176 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,177 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,179 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,185 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;lock := false;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,187 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,188 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,189 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,191 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,192 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,193 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,195 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,196 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,198 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,199 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x + 1;' is: true [2023-06-12 17:59:02,204 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;lock := false;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,206 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,207 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,208 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,210 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,211 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,213 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,214 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,215 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,216 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,218 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,222 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;lock := false;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,224 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,225 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,226 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,228 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,229 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,230 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,231 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,233 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,234 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,235 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,239 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;lock := false;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,241 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,242 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,243 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,244 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,245 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,247 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,248 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,249 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,250 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,251 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,261 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;lock := false;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,262 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,265 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,267 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,269 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,272 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,273 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,276 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,278 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,279 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,281 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'x := x - 1;' is: true [2023-06-12 17:59:02,287 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;lock := false;' and 'assume true;lock := false;' is: true [2023-06-12 17:59:02,288 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume true;lock := false;' is: true [2023-06-12 17:59:02,290 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume true;lock := false;' is: true [2023-06-12 17:59:02,291 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;lock := false;' is: true [2023-06-12 17:59:02,292 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume true;lock := false;' is: true [2023-06-12 17:59:02,293 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume true;lock := false;' is: true [2023-06-12 17:59:02,294 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume true;lock := false;' is: true [2023-06-12 17:59:02,295 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume true;lock := false;' is: true [2023-06-12 17:59:02,297 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume true;lock := false;' is: true [2023-06-12 17:59:02,299 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'assume true;lock := false;' is: false [2023-06-12 17:59:02,300 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume true;lock := false;' is: true [2023-06-12 17:59:02,304 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;lock := false;' and 'assume true;' is: true [2023-06-12 17:59:02,305 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume true;' is: true [2023-06-12 17:59:02,308 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume true;' is: true [2023-06-12 17:59:02,309 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume true;' and 'assume true;' is: true [2023-06-12 17:59:02,311 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume true;' is: true [2023-06-12 17:59:02,312 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x - 1;' and 'assume true;' is: true [2023-06-12 17:59:02,312 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume true;' is: true [2023-06-12 17:59:02,313 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume true;' is: true [2023-06-12 17:59:02,314 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume true;' is: true [2023-06-12 17:59:02,315 INFO L111 IndependenceChecker]: instantiated independence condition for 'assume !lock;lock := true;' and 'assume true;' is: true [2023-06-12 17:59:02,315 INFO L111 IndependenceChecker]: instantiated independence condition for 'x := x + 1;' and 'assume true;' is: true [2023-06-12 17:59:02,352 INFO L201 PluginConnector]: Adding new model inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 05:59:02 HornClauseAST [2023-06-12 17:59:02,353 INFO L131 PluginConnector]: ------------------------ END IcfgToChc---------------------------- [2023-06-12 17:59:02,354 INFO L112 PluginConnector]: ------------------------ChcSmtPrinter---------------------------- [2023-06-12 17:59:02,354 INFO L270 PluginConnector]: Initializing ChcSmtPrinter... [2023-06-12 17:59:02,354 INFO L274 PluginConnector]: ChcSmtPrinter initialized [2023-06-12 17:59:02,355 INFO L184 PluginConnector]: Executing the observer ChcSmtPrinterObserver from plugin ChcSmtPrinter for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,355 INFO L192 hcSmtPrinterObserver]: Writing to file /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/threadmodular/regression/inc-dec-eq0-locked-assert/CHC_inc-dec-eq0-locked-assert.bpl_UID16324782206230891707.smt2 [2023-06-12 17:59:02,388 INFO L131 PluginConnector]: ------------------------ END ChcSmtPrinter---------------------------- [2023-06-12 17:59:02,389 INFO L112 PluginConnector]: ------------------------ChcToBoogie---------------------------- [2023-06-12 17:59:02,389 INFO L270 PluginConnector]: Initializing ChcToBoogie... [2023-06-12 17:59:02,389 INFO L274 PluginConnector]: ChcToBoogie initialized [2023-06-12 17:59:02,390 INFO L184 PluginConnector]: Executing the observer ChcToBoogieObserver from plugin ChcToBoogie for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,412 INFO L201 PluginConnector]: Adding new model inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02 Unit [2023-06-12 17:59:02,412 INFO L131 PluginConnector]: ------------------------ END ChcToBoogie---------------------------- [2023-06-12 17:59:02,413 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-06-12 17:59:02,413 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-06-12 17:59:02,413 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-06-12 17:59:02,413 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,414 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,422 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,422 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,428 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,430 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,441 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,443 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,454 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-06-12 17:59:02,454 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-06-12 17:59:02,454 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-06-12 17:59:02,454 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-06-12 17:59:02,454 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (1/1) ... [2023-06-12 17:59:02,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2023-06-12 17:59:02,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-06-12 17:59:02,461 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2023-06-12 17:59:02,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2023-06-12 17:59:02,465 INFO L124 BoogieDeclarations]: Specification and implementation of procedure gotoProc given in one single declaration [2023-06-12 17:59:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure gotoProc [2023-06-12 17:59:02,465 INFO L138 BoogieDeclarations]: Found implementation of procedure gotoProc [2023-06-12 17:59:02,465 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Ultimate.START given in one single declaration [2023-06-12 17:59:02,465 INFO L130 BoogieDeclarations]: Found specification of procedure Ultimate.START [2023-06-12 17:59:02,465 INFO L138 BoogieDeclarations]: Found implementation of procedure Ultimate.START [2023-06-12 17:59:02,478 INFO L236 CfgBuilder]: Building ICFG [2023-06-12 17:59:02,478 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-06-12 17:59:02,934 INFO L277 CfgBuilder]: Performing block encoding [2023-06-12 17:59:02,938 INFO L294 CfgBuilder]: Using library mode [2023-06-12 17:59:02,938 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-06-12 17:59:02,939 INFO L201 PluginConnector]: Adding new model inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 05:59:02 BoogieIcfgContainer [2023-06-12 17:59:02,939 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-06-12 17:59:02,941 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-06-12 17:59:02,942 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-06-12 17:59:02,944 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-06-12 17:59:02,944 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 05:59:01" (1/5) ... [2023-06-12 17:59:02,946 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2989cec2 and model type inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 05:59:02, skipping insertion in model container [2023-06-12 17:59:02,946 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 05:59:01" (2/5) ... [2023-06-12 17:59:02,947 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2989cec2 and model type inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 05:59:02, skipping insertion in model container [2023-06-12 17:59:02,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.icfgtochc OTHER 12.06 05:59:02" (3/5) ... [2023-06-12 17:59:02,948 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2989cec2 and model type inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction OTHER 12.06 05:59:02, skipping insertion in model container [2023-06-12 17:59:02,948 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.chctoboogie AST 12.06 05:59:02" (4/5) ... [2023-06-12 17:59:02,949 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2989cec2 and model type inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 05:59:02, skipping insertion in model container [2023-06-12 17:59:02,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-dec-eq0-locked-assert.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 05:59:02" (5/5) ... [2023-06-12 17:59:02,950 INFO L112 eAbstractionObserver]: Analyzing ICFG de.uni_freiburg.informatik.ultimate.plugins.chctoboogie.ChcToBoogieObserver [2023-06-12 17:59:02,961 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2023-06-12 17:59:02,961 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-06-12 17:59:03,001 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-06-12 17:59:03,009 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@280549dc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-06-12 17:59:03,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-06-12 17:59:03,018 INFO L276 IsEmpty]: Start isEmpty. Operand has 208 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 133 states have internal predecessors, (195), 73 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2023-06-12 17:59:03,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-06-12 17:59:03,036 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:03,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:03,037 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:03,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:03,040 INFO L85 PathProgramCache]: Analyzing trace with hash 303584459, now seen corresponding path program 1 times [2023-06-12 17:59:03,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:03,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220535347] [2023-06-12 17:59:03,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:03,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:03,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:03,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:03,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 17:59:03,173 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:03,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220535347] [2023-06-12 17:59:03,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [220535347] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:03,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:03,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:03,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911823548] [2023-06-12 17:59:03,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:03,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:03,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:03,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:03,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:03,195 INFO L87 Difference]: Start difference. First operand has 208 states, 132 states have (on average 1.4772727272727273) internal successors, (195), 133 states have internal predecessors, (195), 73 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:03,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:03,828 INFO L93 Difference]: Finished difference Result 410 states and 676 transitions. [2023-06-12 17:59:03,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:03,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2023-06-12 17:59:03,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:03,853 INFO L225 Difference]: With dead ends: 410 [2023-06-12 17:59:03,853 INFO L226 Difference]: Without dead ends: 408 [2023-06-12 17:59:03,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:03,858 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 561 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:03,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 466 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 17:59:03,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-06-12 17:59:03,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2023-06-12 17:59:03,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 260 states have (on average 1.476923076923077) internal successors, (384), 260 states have internal predecessors, (384), 145 states have call successors, (145), 2 states have call predecessors, (145), 2 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2023-06-12 17:59:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 674 transitions. [2023-06-12 17:59:03,952 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 674 transitions. Word has length 8 [2023-06-12 17:59:03,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:03,953 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 674 transitions. [2023-06-12 17:59:03,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:03,953 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 674 transitions. [2023-06-12 17:59:03,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-06-12 17:59:03,961 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:03,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:03,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-06-12 17:59:03,962 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:03,962 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:03,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1250595505, now seen corresponding path program 1 times [2023-06-12 17:59:03,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:03,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569743351] [2023-06-12 17:59:03,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:03,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:03,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:03,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:03,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:03,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 17:59:03,992 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:03,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569743351] [2023-06-12 17:59:03,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1569743351] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:03,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:03,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:03,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180486008] [2023-06-12 17:59:03,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:03,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:03,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:03,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:03,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:03,994 INFO L87 Difference]: Start difference. First operand 408 states and 674 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:04,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:04,529 INFO L93 Difference]: Finished difference Result 674 states and 1184 transitions. [2023-06-12 17:59:04,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:04,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-06-12 17:59:04,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:04,545 INFO L225 Difference]: With dead ends: 674 [2023-06-12 17:59:04,546 INFO L226 Difference]: Without dead ends: 674 [2023-06-12 17:59:04,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:04,547 INFO L413 NwaCegarLoop]: 528 mSDtfsCounter, 65 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1026 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:04,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1026 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 17:59:04,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2023-06-12 17:59:04,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 458. [2023-06-12 17:59:04,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 310 states have (on average 1.7225806451612904) internal successors, (534), 310 states have internal predecessors, (534), 145 states have call successors, (145), 2 states have call predecessors, (145), 2 states have return successors, (145), 145 states have call predecessors, (145), 145 states have call successors, (145) [2023-06-12 17:59:04,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 824 transitions. [2023-06-12 17:59:04,618 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 824 transitions. Word has length 10 [2023-06-12 17:59:04,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:04,619 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 824 transitions. [2023-06-12 17:59:04,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 824 transitions. [2023-06-12 17:59:04,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-06-12 17:59:04,626 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:04,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:04,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-06-12 17:59:04,627 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:04,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:04,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1877337389, now seen corresponding path program 1 times [2023-06-12 17:59:04,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:04,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607320294] [2023-06-12 17:59:04,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:04,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:04,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:04,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:04,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:04,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 17:59:04,661 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:04,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607320294] [2023-06-12 17:59:04,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1607320294] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:04,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:04,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:04,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95853893] [2023-06-12 17:59:04,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:04,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:04,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:04,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:04,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:04,662 INFO L87 Difference]: Start difference. First operand 458 states and 824 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:05,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:05,091 INFO L93 Difference]: Finished difference Result 774 states and 1466 transitions. [2023-06-12 17:59:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:05,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-06-12 17:59:05,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:05,130 INFO L225 Difference]: With dead ends: 774 [2023-06-12 17:59:05,131 INFO L226 Difference]: Without dead ends: 774 [2023-06-12 17:59:05,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:05,131 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 89 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:05,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 1086 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 17:59:05,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2023-06-12 17:59:05,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 702. [2023-06-12 17:59:05,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 702 states, 458 states have (on average 1.8864628820960698) internal successors, (864), 458 states have internal predecessors, (864), 241 states have call successors, (241), 2 states have call predecessors, (241), 2 states have return successors, (241), 241 states have call predecessors, (241), 241 states have call successors, (241) [2023-06-12 17:59:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1346 transitions. [2023-06-12 17:59:05,174 INFO L78 Accepts]: Start accepts. Automaton has 702 states and 1346 transitions. Word has length 10 [2023-06-12 17:59:05,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:05,174 INFO L495 AbstractCegarLoop]: Abstraction has 702 states and 1346 transitions. [2023-06-12 17:59:05,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:05,174 INFO L276 IsEmpty]: Start isEmpty. Operand 702 states and 1346 transitions. [2023-06-12 17:59:05,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-06-12 17:59:05,201 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:05,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:05,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-06-12 17:59:05,201 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:05,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:05,202 INFO L85 PathProgramCache]: Analyzing trace with hash -679070124, now seen corresponding path program 1 times [2023-06-12 17:59:05,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:05,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614037554] [2023-06-12 17:59:05,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:05,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:05,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:05,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:05,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 17:59:05,221 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:05,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614037554] [2023-06-12 17:59:05,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [614037554] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:05,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:05,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:05,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710371193] [2023-06-12 17:59:05,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:05,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:05,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:05,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:05,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:05,222 INFO L87 Difference]: Start difference. First operand 702 states and 1346 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:05,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:05,705 INFO L93 Difference]: Finished difference Result 1114 states and 2184 transitions. [2023-06-12 17:59:05,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:05,706 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-06-12 17:59:05,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:05,745 INFO L225 Difference]: With dead ends: 1114 [2023-06-12 17:59:05,745 INFO L226 Difference]: Without dead ends: 1114 [2023-06-12 17:59:05,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:05,749 INFO L413 NwaCegarLoop]: 527 mSDtfsCounter, 67 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:05,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1024 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 17:59:05,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2023-06-12 17:59:05,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 754. [2023-06-12 17:59:05,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 510 states have (on average 2.16078431372549) internal successors, (1102), 510 states have internal predecessors, (1102), 241 states have call successors, (241), 2 states have call predecessors, (241), 2 states have return successors, (241), 241 states have call predecessors, (241), 241 states have call successors, (241) [2023-06-12 17:59:05,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 1584 transitions. [2023-06-12 17:59:05,830 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 1584 transitions. Word has length 13 [2023-06-12 17:59:05,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:05,830 INFO L495 AbstractCegarLoop]: Abstraction has 754 states and 1584 transitions. [2023-06-12 17:59:05,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:05,831 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 1584 transitions. [2023-06-12 17:59:05,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-06-12 17:59:05,858 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:05,858 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:05,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-06-12 17:59:05,858 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:05,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:05,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1465862340, now seen corresponding path program 1 times [2023-06-12 17:59:05,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:05,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630274293] [2023-06-12 17:59:05,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:05,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:05,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:05,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:05,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:05,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-06-12 17:59:05,899 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:05,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630274293] [2023-06-12 17:59:05,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1630274293] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:05,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:05,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:05,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105215120] [2023-06-12 17:59:05,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:05,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:05,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:05,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:05,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:05,900 INFO L87 Difference]: Start difference. First operand 754 states and 1584 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:06,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:06,362 INFO L93 Difference]: Finished difference Result 1072 states and 2318 transitions. [2023-06-12 17:59:06,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:06,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-06-12 17:59:06,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:06,396 INFO L225 Difference]: With dead ends: 1072 [2023-06-12 17:59:06,396 INFO L226 Difference]: Without dead ends: 1072 [2023-06-12 17:59:06,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:06,397 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 91 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:06,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1084 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 17:59:06,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2023-06-12 17:59:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1000. [2023-06-12 17:59:06,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 660 states have (on average 2.309090909090909) internal successors, (1524), 660 states have internal predecessors, (1524), 337 states have call successors, (337), 2 states have call predecessors, (337), 2 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2023-06-12 17:59:06,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 2198 transitions. [2023-06-12 17:59:06,464 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 2198 transitions. Word has length 13 [2023-06-12 17:59:06,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:06,464 INFO L495 AbstractCegarLoop]: Abstraction has 1000 states and 2198 transitions. [2023-06-12 17:59:06,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:06,465 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 2198 transitions. [2023-06-12 17:59:06,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-06-12 17:59:06,526 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:06,527 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:06,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-06-12 17:59:06,527 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:06,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:06,527 INFO L85 PathProgramCache]: Analyzing trace with hash 87676867, now seen corresponding path program 1 times [2023-06-12 17:59:06,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:06,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733590936] [2023-06-12 17:59:06,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:06,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:06,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:06,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-06-12 17:59:06,546 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:06,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733590936] [2023-06-12 17:59:06,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1733590936] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:06,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:06,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:06,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777112248] [2023-06-12 17:59:06,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:06,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:06,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:06,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:06,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:06,547 INFO L87 Difference]: Start difference. First operand 1000 states and 2198 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:07,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:07,093 INFO L93 Difference]: Finished difference Result 1558 states and 3370 transitions. [2023-06-12 17:59:07,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:07,093 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-06-12 17:59:07,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:07,178 INFO L225 Difference]: With dead ends: 1558 [2023-06-12 17:59:07,178 INFO L226 Difference]: Without dead ends: 1558 [2023-06-12 17:59:07,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:07,181 INFO L413 NwaCegarLoop]: 526 mSDtfsCounter, 69 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:07,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 1022 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 17:59:07,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1558 states. [2023-06-12 17:59:07,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1558 to 1054. [2023-06-12 17:59:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 714 states have (on average 2.5994397759103642) internal successors, (1856), 714 states have internal predecessors, (1856), 337 states have call successors, (337), 2 states have call predecessors, (337), 2 states have return successors, (337), 337 states have call predecessors, (337), 337 states have call successors, (337) [2023-06-12 17:59:07,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 2530 transitions. [2023-06-12 17:59:07,307 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 2530 transitions. Word has length 16 [2023-06-12 17:59:07,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:07,307 INFO L495 AbstractCegarLoop]: Abstraction has 1054 states and 2530 transitions. [2023-06-12 17:59:07,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:07,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 2530 transitions. [2023-06-12 17:59:07,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-06-12 17:59:07,387 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:07,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:07,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-06-12 17:59:07,387 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:07,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:07,387 INFO L85 PathProgramCache]: Analyzing trace with hash -2091098763, now seen corresponding path program 1 times [2023-06-12 17:59:07,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:07,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1609074015] [2023-06-12 17:59:07,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:07,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:07,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:07,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-06-12 17:59:07,407 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:07,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1609074015] [2023-06-12 17:59:07,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1609074015] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:07,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:07,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:07,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170514250] [2023-06-12 17:59:07,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:07,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:07,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:07,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:07,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:07,408 INFO L87 Difference]: Start difference. First operand 1054 states and 2530 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:07,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:07,862 INFO L93 Difference]: Finished difference Result 1374 states and 3362 transitions. [2023-06-12 17:59:07,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:07,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-06-12 17:59:07,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:07,920 INFO L225 Difference]: With dead ends: 1374 [2023-06-12 17:59:07,921 INFO L226 Difference]: Without dead ends: 1374 [2023-06-12 17:59:07,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:07,922 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 93 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:07,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1082 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 17:59:07,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2023-06-12 17:59:08,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1302. [2023-06-12 17:59:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 866 states have (on average 2.74364896073903) internal successors, (2376), 866 states have internal predecessors, (2376), 433 states have call successors, (433), 2 states have call predecessors, (433), 2 states have return successors, (433), 433 states have call predecessors, (433), 433 states have call successors, (433) [2023-06-12 17:59:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 3242 transitions. [2023-06-12 17:59:08,047 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 3242 transitions. Word has length 16 [2023-06-12 17:59:08,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:08,047 INFO L495 AbstractCegarLoop]: Abstraction has 1302 states and 3242 transitions. [2023-06-12 17:59:08,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:08,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 3242 transitions. [2023-06-12 17:59:08,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-06-12 17:59:08,211 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:08,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:08,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-06-12 17:59:08,211 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:08,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:08,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2084293378, now seen corresponding path program 1 times [2023-06-12 17:59:08,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:08,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966639546] [2023-06-12 17:59:08,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:08,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:08,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:08,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:08,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-06-12 17:59:08,246 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:08,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966639546] [2023-06-12 17:59:08,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [966639546] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:08,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:08,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:08,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985828750] [2023-06-12 17:59:08,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:08,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:08,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:08,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:08,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:08,248 INFO L87 Difference]: Start difference. First operand 1302 states and 3242 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:08,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:08,852 INFO L93 Difference]: Finished difference Result 2006 states and 4754 transitions. [2023-06-12 17:59:08,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:08,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-06-12 17:59:08,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:08,985 INFO L225 Difference]: With dead ends: 2006 [2023-06-12 17:59:08,985 INFO L226 Difference]: Without dead ends: 2006 [2023-06-12 17:59:08,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:08,986 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 71 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:08,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 1020 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 17:59:08,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2023-06-12 17:59:09,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1358. [2023-06-12 17:59:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1358 states, 922 states have (on average 3.0455531453362257) internal successors, (2808), 922 states have internal predecessors, (2808), 433 states have call successors, (433), 2 states have call predecessors, (433), 2 states have return successors, (433), 433 states have call predecessors, (433), 433 states have call successors, (433) [2023-06-12 17:59:09,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 3674 transitions. [2023-06-12 17:59:09,161 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 3674 transitions. Word has length 19 [2023-06-12 17:59:09,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:09,161 INFO L495 AbstractCegarLoop]: Abstraction has 1358 states and 3674 transitions. [2023-06-12 17:59:09,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:09,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 3674 transitions. [2023-06-12 17:59:09,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-06-12 17:59:09,356 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:09,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:09,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-06-12 17:59:09,357 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:09,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:09,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1420665388, now seen corresponding path program 1 times [2023-06-12 17:59:09,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:09,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841293646] [2023-06-12 17:59:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:09,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:09,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:09,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:09,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-06-12 17:59:09,383 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:09,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841293646] [2023-06-12 17:59:09,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1841293646] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:09,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:09,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:09,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558239038] [2023-06-12 17:59:09,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:09,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:09,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:09,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:09,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:09,384 INFO L87 Difference]: Start difference. First operand 1358 states and 3674 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:09,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:09,934 INFO L93 Difference]: Finished difference Result 1680 states and 4610 transitions. [2023-06-12 17:59:09,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:09,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-06-12 17:59:09,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:10,033 INFO L225 Difference]: With dead ends: 1680 [2023-06-12 17:59:10,033 INFO L226 Difference]: Without dead ends: 1680 [2023-06-12 17:59:10,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:10,033 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 95 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:10,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 1080 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 17:59:10,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1680 states. [2023-06-12 17:59:10,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1680 to 1608. [2023-06-12 17:59:10,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1608 states, 1076 states have (on average 3.1895910780669143) internal successors, (3432), 1076 states have internal predecessors, (3432), 529 states have call successors, (529), 2 states have call predecessors, (529), 2 states have return successors, (529), 529 states have call predecessors, (529), 529 states have call successors, (529) [2023-06-12 17:59:10,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1608 states to 1608 states and 4490 transitions. [2023-06-12 17:59:10,219 INFO L78 Accepts]: Start accepts. Automaton has 1608 states and 4490 transitions. Word has length 19 [2023-06-12 17:59:10,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:10,219 INFO L495 AbstractCegarLoop]: Abstraction has 1608 states and 4490 transitions. [2023-06-12 17:59:10,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:10,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1608 states and 4490 transitions. [2023-06-12 17:59:10,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-06-12 17:59:10,588 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:10,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:10,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-06-12 17:59:10,588 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:10,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:10,588 INFO L85 PathProgramCache]: Analyzing trace with hash 377355155, now seen corresponding path program 1 times [2023-06-12 17:59:10,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:10,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219270706] [2023-06-12 17:59:10,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:10,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:10,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:10,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-06-12 17:59:10,619 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:10,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219270706] [2023-06-12 17:59:10,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1219270706] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:10,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:10,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:10,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469192403] [2023-06-12 17:59:10,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:10,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:10,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:10,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:10,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:10,621 INFO L87 Difference]: Start difference. First operand 1608 states and 4490 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:11,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:11,387 INFO L93 Difference]: Finished difference Result 2458 states and 6348 transitions. [2023-06-12 17:59:11,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:11,388 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-06-12 17:59:11,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:11,585 INFO L225 Difference]: With dead ends: 2458 [2023-06-12 17:59:11,585 INFO L226 Difference]: Without dead ends: 2458 [2023-06-12 17:59:11,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:11,586 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 73 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 1018 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:11,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 1018 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 17:59:11,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2458 states. [2023-06-12 17:59:11,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2458 to 1666. [2023-06-12 17:59:11,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1134 states have (on average 3.5008818342151677) internal successors, (3970), 1134 states have internal predecessors, (3970), 529 states have call successors, (529), 2 states have call predecessors, (529), 2 states have return successors, (529), 529 states have call predecessors, (529), 529 states have call successors, (529) [2023-06-12 17:59:11,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 5028 transitions. [2023-06-12 17:59:11,905 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 5028 transitions. Word has length 22 [2023-06-12 17:59:11,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:11,906 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 5028 transitions. [2023-06-12 17:59:11,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:11,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 5028 transitions. [2023-06-12 17:59:12,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-06-12 17:59:12,359 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:12,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:12,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-06-12 17:59:12,359 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:12,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:12,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1068610309, now seen corresponding path program 1 times [2023-06-12 17:59:12,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:12,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500296465] [2023-06-12 17:59:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:12,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:12,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:12,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-06-12 17:59:12,386 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:12,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500296465] [2023-06-12 17:59:12,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1500296465] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:12,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:12,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:12,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206188628] [2023-06-12 17:59:12,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:12,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:12,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:12,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:12,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:12,387 INFO L87 Difference]: Start difference. First operand 1666 states and 5028 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:12,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:12,959 INFO L93 Difference]: Finished difference Result 1990 states and 6074 transitions. [2023-06-12 17:59:12,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:12,960 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-06-12 17:59:12,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:13,085 INFO L225 Difference]: With dead ends: 1990 [2023-06-12 17:59:13,086 INFO L226 Difference]: Without dead ends: 1990 [2023-06-12 17:59:13,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:13,087 INFO L413 NwaCegarLoop]: 512 mSDtfsCounter, 97 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:13,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 1078 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 17:59:13,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1990 states. [2023-06-12 17:59:13,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1990 to 1918. [2023-06-12 17:59:13,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1290 states have (on average 3.646511627906977) internal successors, (4704), 1290 states have internal predecessors, (4704), 625 states have call successors, (625), 2 states have call predecessors, (625), 2 states have return successors, (625), 625 states have call predecessors, (625), 625 states have call successors, (625) [2023-06-12 17:59:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 5954 transitions. [2023-06-12 17:59:13,303 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 5954 transitions. Word has length 22 [2023-06-12 17:59:13,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:13,303 INFO L495 AbstractCegarLoop]: Abstraction has 1918 states and 5954 transitions. [2023-06-12 17:59:13,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:13,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 5954 transitions. [2023-06-12 17:59:14,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 17:59:14,059 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:14,059 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:14,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-06-12 17:59:14,059 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:14,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:14,060 INFO L85 PathProgramCache]: Analyzing trace with hash 222129276, now seen corresponding path program 1 times [2023-06-12 17:59:14,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:14,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005654704] [2023-06-12 17:59:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:14,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:14,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:14,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 17:59:14,089 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:14,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005654704] [2023-06-12 17:59:14,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1005654704] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:14,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:14,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:14,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058707706] [2023-06-12 17:59:14,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:14,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:14,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:14,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:14,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:14,091 INFO L87 Difference]: Start difference. First operand 1918 states and 5954 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 17:59:15,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:15,027 INFO L93 Difference]: Finished difference Result 2914 states and 8164 transitions. [2023-06-12 17:59:15,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:15,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-06-12 17:59:15,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:15,463 INFO L225 Difference]: With dead ends: 2914 [2023-06-12 17:59:15,463 INFO L226 Difference]: Without dead ends: 2914 [2023-06-12 17:59:15,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:15,464 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 94 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:15,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 813 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 17:59:15,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2914 states. [2023-06-12 17:59:15,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2914 to 1978. [2023-06-12 17:59:15,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1350 states have (on average 3.965925925925926) internal successors, (5354), 1350 states have internal predecessors, (5354), 625 states have call successors, (625), 2 states have call predecessors, (625), 2 states have return successors, (625), 625 states have call predecessors, (625), 625 states have call successors, (625) [2023-06-12 17:59:15,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 6604 transitions. [2023-06-12 17:59:15,866 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 6604 transitions. Word has length 27 [2023-06-12 17:59:15,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:15,866 INFO L495 AbstractCegarLoop]: Abstraction has 1978 states and 6604 transitions. [2023-06-12 17:59:15,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 17:59:15,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 6604 transitions. [2023-06-12 17:59:16,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 17:59:16,589 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:16,589 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:16,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-06-12 17:59:16,590 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:16,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:16,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1873276098, now seen corresponding path program 1 times [2023-06-12 17:59:16,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:16,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667555621] [2023-06-12 17:59:16,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:16,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:16,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:16,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:16,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 17:59:16,622 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:16,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667555621] [2023-06-12 17:59:16,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [667555621] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:16,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:16,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:16,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365111504] [2023-06-12 17:59:16,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:16,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:16,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:16,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:16,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:16,623 INFO L87 Difference]: Start difference. First operand 1978 states and 6604 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 17:59:17,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:17,337 INFO L93 Difference]: Finished difference Result 2304 states and 7724 transitions. [2023-06-12 17:59:17,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:17,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-06-12 17:59:17,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:17,598 INFO L225 Difference]: With dead ends: 2304 [2023-06-12 17:59:17,598 INFO L226 Difference]: Without dead ends: 2304 [2023-06-12 17:59:17,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:17,599 INFO L413 NwaCegarLoop]: 507 mSDtfsCounter, 99 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 925 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:17,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 925 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 17:59:17,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2304 states. [2023-06-12 17:59:17,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2304 to 1978. [2023-06-12 17:59:17,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1350 states have (on average 3.965925925925926) internal successors, (5354), 1350 states have internal predecessors, (5354), 625 states have call successors, (625), 2 states have call predecessors, (625), 2 states have return successors, (625), 625 states have call predecessors, (625), 625 states have call successors, (625) [2023-06-12 17:59:17,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 6604 transitions. [2023-06-12 17:59:17,832 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 6604 transitions. Word has length 27 [2023-06-12 17:59:17,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:17,833 INFO L495 AbstractCegarLoop]: Abstraction has 1978 states and 6604 transitions. [2023-06-12 17:59:17,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 17:59:17,833 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 6604 transitions. [2023-06-12 17:59:18,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 17:59:18,486 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:18,486 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:18,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-06-12 17:59:18,486 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:18,487 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:18,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1227176122, now seen corresponding path program 1 times [2023-06-12 17:59:18,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:18,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590004848] [2023-06-12 17:59:18,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:18,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:18,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:18,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:18,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 17:59:18,508 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:18,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590004848] [2023-06-12 17:59:18,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [590004848] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:18,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:18,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:18,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444020313] [2023-06-12 17:59:18,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:18,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:18,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:18,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:18,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:18,509 INFO L87 Difference]: Start difference. First operand 1978 states and 6604 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 17:59:19,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:19,379 INFO L93 Difference]: Finished difference Result 2558 states and 8780 transitions. [2023-06-12 17:59:19,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:19,379 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-06-12 17:59:19,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:19,624 INFO L225 Difference]: With dead ends: 2558 [2023-06-12 17:59:19,625 INFO L226 Difference]: Without dead ends: 2558 [2023-06-12 17:59:19,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:19,625 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 115 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:19,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 837 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-06-12 17:59:19,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2558 states. [2023-06-12 17:59:19,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2558 to 2232. [2023-06-12 17:59:19,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2232 states, 1508 states have (on average 4.123342175066313) internal successors, (6218), 1508 states have internal predecessors, (6218), 721 states have call successors, (721), 2 states have call predecessors, (721), 2 states have return successors, (721), 721 states have call predecessors, (721), 721 states have call successors, (721) [2023-06-12 17:59:20,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 7660 transitions. [2023-06-12 17:59:20,041 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 7660 transitions. Word has length 27 [2023-06-12 17:59:20,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:20,041 INFO L495 AbstractCegarLoop]: Abstraction has 2232 states and 7660 transitions. [2023-06-12 17:59:20,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 17:59:20,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 7660 transitions. [2023-06-12 17:59:20,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 17:59:20,824 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:20,824 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:20,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-06-12 17:59:20,824 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:20,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:20,824 INFO L85 PathProgramCache]: Analyzing trace with hash -626257268, now seen corresponding path program 1 times [2023-06-12 17:59:20,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:20,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694809401] [2023-06-12 17:59:20,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:20,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:20,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:20,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 17:59:20,842 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:20,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694809401] [2023-06-12 17:59:20,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [694809401] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:20,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:20,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:20,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217439155] [2023-06-12 17:59:20,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:20,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:20,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:20,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:20,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:20,843 INFO L87 Difference]: Start difference. First operand 2232 states and 7660 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 17:59:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:21,803 INFO L93 Difference]: Finished difference Result 3374 states and 10230 transitions. [2023-06-12 17:59:21,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:21,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-06-12 17:59:21,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:22,363 INFO L225 Difference]: With dead ends: 3374 [2023-06-12 17:59:22,364 INFO L226 Difference]: Without dead ends: 3374 [2023-06-12 17:59:22,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:22,364 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 99 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:22,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 793 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 17:59:22,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3374 states. [2023-06-12 17:59:22,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3374 to 2294. [2023-06-12 17:59:22,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2294 states, 1570 states have (on average 4.450955414012739) internal successors, (6988), 1570 states have internal predecessors, (6988), 721 states have call successors, (721), 2 states have call predecessors, (721), 2 states have return successors, (721), 721 states have call predecessors, (721), 721 states have call successors, (721) [2023-06-12 17:59:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2294 states to 2294 states and 8430 transitions. [2023-06-12 17:59:22,794 INFO L78 Accepts]: Start accepts. Automaton has 2294 states and 8430 transitions. Word has length 27 [2023-06-12 17:59:22,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:22,795 INFO L495 AbstractCegarLoop]: Abstraction has 2294 states and 8430 transitions. [2023-06-12 17:59:22,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 17:59:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2294 states and 8430 transitions. [2023-06-12 17:59:23,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 17:59:23,858 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:23,858 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:23,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-06-12 17:59:23,858 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:23,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:23,858 INFO L85 PathProgramCache]: Analyzing trace with hash -581076146, now seen corresponding path program 1 times [2023-06-12 17:59:23,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:23,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593573214] [2023-06-12 17:59:23,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:23,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:23,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:23,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:23,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 17:59:23,885 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:23,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593573214] [2023-06-12 17:59:23,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [593573214] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:23,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:23,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:23,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445621654] [2023-06-12 17:59:23,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:23,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:23,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:23,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:23,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:23,886 INFO L87 Difference]: Start difference. First operand 2294 states and 8430 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 17:59:24,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:24,916 INFO L93 Difference]: Finished difference Result 3436 states and 11042 transitions. [2023-06-12 17:59:24,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:24,916 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-06-12 17:59:24,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:25,364 INFO L225 Difference]: With dead ends: 3436 [2023-06-12 17:59:25,364 INFO L226 Difference]: Without dead ends: 3436 [2023-06-12 17:59:25,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:25,365 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 114 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:25,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 733 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 17:59:25,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2023-06-12 17:59:25,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2356. [2023-06-12 17:59:25,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2356 states, 1632 states have (on average 4.779411764705882) internal successors, (7800), 1632 states have internal predecessors, (7800), 721 states have call successors, (721), 2 states have call predecessors, (721), 2 states have return successors, (721), 721 states have call predecessors, (721), 721 states have call successors, (721) [2023-06-12 17:59:25,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2356 states to 2356 states and 9242 transitions. [2023-06-12 17:59:25,899 INFO L78 Accepts]: Start accepts. Automaton has 2356 states and 9242 transitions. Word has length 27 [2023-06-12 17:59:25,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:25,899 INFO L495 AbstractCegarLoop]: Abstraction has 2356 states and 9242 transitions. [2023-06-12 17:59:25,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 17:59:25,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2356 states and 9242 transitions. [2023-06-12 17:59:26,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 17:59:26,785 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:26,785 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:26,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-06-12 17:59:26,785 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:26,786 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:26,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1465264218, now seen corresponding path program 1 times [2023-06-12 17:59:26,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:26,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928241921] [2023-06-12 17:59:26,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:26,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:26,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:26,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-06-12 17:59:26,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:26,826 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-06-12 17:59:26,826 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:26,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928241921] [2023-06-12 17:59:26,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [928241921] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 17:59:26,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 17:59:26,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 17:59:26,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394810790] [2023-06-12 17:59:26,826 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 17:59:26,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 17:59:26,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:26,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 17:59:26,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 17:59:26,827 INFO L87 Difference]: Start difference. First operand 2356 states and 9242 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-06-12 17:59:31,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:31,494 INFO L93 Difference]: Finished difference Result 6214 states and 20841 transitions. [2023-06-12 17:59:31,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-06-12 17:59:31,495 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-06-12 17:59:31,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:33,977 INFO L225 Difference]: With dead ends: 6214 [2023-06-12 17:59:33,977 INFO L226 Difference]: Without dead ends: 6027 [2023-06-12 17:59:33,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-06-12 17:59:33,978 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 594 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 966 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 2719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:33,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [966 Valid, 1097 Invalid, 2719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-06-12 17:59:33,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6027 states. [2023-06-12 17:59:35,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6027 to 4623. [2023-06-12 17:59:35,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4623 states, 2470 states have (on average 4.874089068825911) internal successors, (12039), 3167 states have internal predecessors, (12039), 2149 states have call successors, (2149), 2 states have call predecessors, (2149), 3 states have return successors, (3469), 1453 states have call predecessors, (3469), 2149 states have call successors, (3469) [2023-06-12 17:59:37,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4623 states to 4623 states and 17657 transitions. [2023-06-12 17:59:37,103 INFO L78 Accepts]: Start accepts. Automaton has 4623 states and 17657 transitions. Word has length 27 [2023-06-12 17:59:37,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:37,104 INFO L495 AbstractCegarLoop]: Abstraction has 4623 states and 17657 transitions. [2023-06-12 17:59:37,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-06-12 17:59:37,104 INFO L276 IsEmpty]: Start isEmpty. Operand 4623 states and 17657 transitions. [2023-06-12 17:59:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-06-12 17:59:39,007 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:39,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:39,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-06-12 17:59:39,008 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:39,008 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:39,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1052165018, now seen corresponding path program 1 times [2023-06-12 17:59:39,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:39,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1419142774] [2023-06-12 17:59:39,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:39,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:39,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:39,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:39,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-06-12 17:59:39,039 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:39,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1419142774] [2023-06-12 17:59:39,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1419142774] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:39,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:39,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:39,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121664994] [2023-06-12 17:59:39,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:39,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:39,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:39,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:39,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:39,040 INFO L87 Difference]: Start difference. First operand 4623 states and 17657 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:42,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:42,743 INFO L93 Difference]: Finished difference Result 6336 states and 22571 transitions. [2023-06-12 17:59:42,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:42,743 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-06-12 17:59:42,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:45,547 INFO L225 Difference]: With dead ends: 6336 [2023-06-12 17:59:45,547 INFO L226 Difference]: Without dead ends: 6336 [2023-06-12 17:59:45,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:45,548 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 78 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:45,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 809 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-06-12 17:59:45,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6336 states. [2023-06-12 17:59:47,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6336 to 4623. [2023-06-12 17:59:47,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4623 states, 2470 states have (on average 4.874089068825911) internal successors, (12039), 3167 states have internal predecessors, (12039), 2149 states have call successors, (2149), 2 states have call predecessors, (2149), 3 states have return successors, (3469), 1453 states have call predecessors, (3469), 2149 states have call successors, (3469) [2023-06-12 17:59:49,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4623 states to 4623 states and 17657 transitions. [2023-06-12 17:59:49,304 INFO L78 Accepts]: Start accepts. Automaton has 4623 states and 17657 transitions. Word has length 25 [2023-06-12 17:59:49,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 17:59:49,304 INFO L495 AbstractCegarLoop]: Abstraction has 4623 states and 17657 transitions. [2023-06-12 17:59:49,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 4623 states and 17657 transitions. [2023-06-12 17:59:51,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-06-12 17:59:51,046 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 17:59:51,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 17:59:51,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-06-12 17:59:51,046 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 17:59:51,046 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 17:59:51,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1582566328, now seen corresponding path program 1 times [2023-06-12 17:59:51,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 17:59:51,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146889615] [2023-06-12 17:59:51,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 17:59:51,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 17:59:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 17:59:51,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 17:59:51,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 17:59:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-06-12 17:59:51,068 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 17:59:51,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146889615] [2023-06-12 17:59:51,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [146889615] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 17:59:51,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 17:59:51,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 17:59:51,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709061402] [2023-06-12 17:59:51,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 17:59:51,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 17:59:51,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 17:59:51,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 17:59:51,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 17:59:51,069 INFO L87 Difference]: Start difference. First operand 4623 states and 17657 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 17:59:54,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 17:59:54,122 INFO L93 Difference]: Finished difference Result 5854 states and 22708 transitions. [2023-06-12 17:59:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 17:59:54,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-06-12 17:59:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 17:59:57,243 INFO L225 Difference]: With dead ends: 5854 [2023-06-12 17:59:57,243 INFO L226 Difference]: Without dead ends: 5854 [2023-06-12 17:59:57,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 17:59:57,244 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 99 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-06-12 17:59:57,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 683 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-06-12 17:59:57,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5854 states. [2023-06-12 17:59:59,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5854 to 5155. [2023-06-12 17:59:59,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5155 states, 2714 states have (on average 5.046794399410464) internal successors, (13697), 3507 states have internal predecessors, (13697), 2437 states have call successors, (2437), 2 states have call predecessors, (2437), 3 states have return successors, (3937), 1645 states have call predecessors, (3937), 2437 states have call successors, (3937) [2023-06-12 18:00:00,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5155 states to 5155 states and 20071 transitions. [2023-06-12 18:00:00,856 INFO L78 Accepts]: Start accepts. Automaton has 5155 states and 20071 transitions. Word has length 25 [2023-06-12 18:00:00,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:00:00,856 INFO L495 AbstractCegarLoop]: Abstraction has 5155 states and 20071 transitions. [2023-06-12 18:00:00,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-06-12 18:00:00,856 INFO L276 IsEmpty]: Start isEmpty. Operand 5155 states and 20071 transitions. [2023-06-12 18:00:03,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 18:00:03,276 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:00:03,276 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:00:03,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-06-12 18:00:03,277 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:00:03,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:00:03,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1937459921, now seen corresponding path program 1 times [2023-06-12 18:00:03,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:00:03,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224033245] [2023-06-12 18:00:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:00:03,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:00:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:00:03,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-06-12 18:00:03,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:00:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-06-12 18:00:03,302 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:00:03,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224033245] [2023-06-12 18:00:03,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [224033245] provided 1 perfect and 0 imperfect interpolant sequences [2023-06-12 18:00:03,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-06-12 18:00:03,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-06-12 18:00:03,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952239131] [2023-06-12 18:00:03,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-06-12 18:00:03,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-06-12 18:00:03,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:00:03,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-06-12 18:00:03,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-06-12 18:00:03,303 INFO L87 Difference]: Start difference. First operand 5155 states and 20071 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:00:07,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:00:07,313 INFO L93 Difference]: Finished difference Result 6325 states and 24967 transitions. [2023-06-12 18:00:07,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-06-12 18:00:07,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-06-12 18:00:07,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:00:10,247 INFO L225 Difference]: With dead ends: 6325 [2023-06-12 18:00:10,247 INFO L226 Difference]: Without dead ends: 6325 [2023-06-12 18:00:10,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-06-12 18:00:10,248 INFO L413 NwaCegarLoop]: 489 mSDtfsCounter, 123 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 793 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-06-12 18:00:10,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 793 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-06-12 18:00:10,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6325 states. [2023-06-12 18:00:12,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6325 to 5650. [2023-06-12 18:00:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5650 states, 2957 states have (on average 5.201217450118363) internal successors, (15380), 3822 states have internal predecessors, (15380), 2689 states have call successors, (2689), 2 states have call predecessors, (2689), 3 states have return successors, (4333), 1825 states have call predecessors, (4333), 2689 states have call successors, (4333) [2023-06-12 18:00:14,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5650 states to 5650 states and 22402 transitions. [2023-06-12 18:00:14,562 INFO L78 Accepts]: Start accepts. Automaton has 5650 states and 22402 transitions. Word has length 27 [2023-06-12 18:00:14,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:00:14,563 INFO L495 AbstractCegarLoop]: Abstraction has 5650 states and 22402 transitions. [2023-06-12 18:00:14,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-06-12 18:00:14,563 INFO L276 IsEmpty]: Start isEmpty. Operand 5650 states and 22402 transitions. [2023-06-12 18:00:16,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-06-12 18:00:16,953 INFO L187 NwaCegarLoop]: Found error trace [2023-06-12 18:00:16,953 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-06-12 18:00:16,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-06-12 18:00:16,953 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY === [Ultimate.STARTErr0ASSERT_VIOLATIONCHC_SATISFIABILITY] === [2023-06-12 18:00:16,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-06-12 18:00:16,954 INFO L85 PathProgramCache]: Analyzing trace with hash 2140369744, now seen corresponding path program 1 times [2023-06-12 18:00:16,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2023-06-12 18:00:16,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918701962] [2023-06-12 18:00:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-06-12 18:00:16,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-06-12 18:00:16,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-06-12 18:00:16,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-06-12 18:00:16,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-06-12 18:00:16,984 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-06-12 18:00:16,984 INFO L136 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2023-06-12 18:00:16,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918701962] [2023-06-12 18:00:16,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModulePreferences [1918701962] provided 0 perfect and 1 imperfect interpolant sequences [2023-06-12 18:00:16,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-06-12 18:00:16,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-06-12 18:00:16,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414207800] [2023-06-12 18:00:16,985 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-06-12 18:00:16,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-06-12 18:00:16,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2023-06-12 18:00:16,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-06-12 18:00:16,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-06-12 18:00:16,986 INFO L87 Difference]: Start difference. First operand 5650 states and 22402 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-06-12 18:00:32,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-06-12 18:00:32,719 INFO L93 Difference]: Finished difference Result 10737 states and 49081 transitions. [2023-06-12 18:00:32,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-06-12 18:00:32,727 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) Word has length 27 [2023-06-12 18:00:32,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-06-12 18:00:44,598 INFO L225 Difference]: With dead ends: 10737 [2023-06-12 18:00:44,598 INFO L226 Difference]: Without dead ends: 10737 [2023-06-12 18:00:44,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-06-12 18:00:44,600 INFO L413 NwaCegarLoop]: 344 mSDtfsCounter, 639 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 2438 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 3122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 2438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-06-12 18:00:44,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1035 Valid, 876 Invalid, 3122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 2438 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-06-12 18:00:44,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10737 states. [2023-06-12 18:00:52,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10737 to 9783. [2023-06-12 18:00:52,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9783 states, 5060 states have (on average 5.247628458498023) internal successors, (26553), 6647 states have internal predecessors, (26553), 4717 states have call successors, (4717), 2 states have call predecessors, (4717), 5 states have return successors, (14461), 3133 states have call predecessors, (14461), 4717 states have call successors, (14461) [2023-06-12 18:01:01,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9783 states to 9783 states and 45731 transitions. [2023-06-12 18:01:01,821 INFO L78 Accepts]: Start accepts. Automaton has 9783 states and 45731 transitions. Word has length 27 [2023-06-12 18:01:01,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-06-12 18:01:01,822 INFO L495 AbstractCegarLoop]: Abstraction has 9783 states and 45731 transitions. [2023-06-12 18:01:01,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 3 states have call successors, (3) [2023-06-12 18:01:01,822 INFO L276 IsEmpty]: Start isEmpty. Operand 9783 states and 45731 transitions.