/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound100.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:10:07,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:10:07,514 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:10:07,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:10:07,582 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:10:07,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:10:07,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:10:07,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:10:07,615 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:10:07,621 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:10:07,621 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:10:07,623 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:10:07,623 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:10:07,625 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:10:07,626 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:10:07,628 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:10:07,631 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:10:07,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:10:07,634 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:10:07,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:10:07,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:10:07,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:10:07,665 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:10:07,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:10:07,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:10:07,674 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:10:07,675 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:10:07,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:10:07,684 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:10:07,696 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:10:07,696 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:10:07,699 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:10:07,699 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:10:07,699 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:10:07,699 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:10:07,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:10:07,700 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:10:07,700 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:10:07,700 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:10:07,701 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:10:07,701 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:10:07,701 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:10:07,701 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:10:07,701 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:10:07,701 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:10:07,701 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:10:07,702 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:10:07,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:10:07,702 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:10:07,702 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:10:07,703 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:10:07,703 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:10:08,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:10:08,057 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:10:08,059 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:10:08,060 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:10:08,062 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:10:08,063 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound100.i [2021-05-02 20:10:08,120 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a140da58c/7df3b806ea3e49d69c9e21edb18f542d/FLAGb38969b26 [2021-05-02 20:10:08,608 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:10:08,608 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound100.i [2021-05-02 20:10:08,613 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a140da58c/7df3b806ea3e49d69c9e21edb18f542d/FLAGb38969b26 [2021-05-02 20:10:08,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a140da58c/7df3b806ea3e49d69c9e21edb18f542d [2021-05-02 20:10:08,637 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:10:08,640 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:10:08,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:10:08,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:10:08,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:10:08,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:10:08" (1/1) ... [2021-05-02 20:10:08,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f10378d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:10:08, skipping insertion in model container [2021-05-02 20:10:08,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:10:08" (1/1) ... [2021-05-02 20:10:08,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:10:08,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:10:08,794 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound100.i[958,971] [2021-05-02 20:10:08,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:10:08,858 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:10:08,877 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound100.i[958,971] [2021-05-02 20:10:08,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:10:08,903 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:10:08,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:10:08 WrapperNode [2021-05-02 20:10:08,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:10:08,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:10:08,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:10:08,904 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:10:08,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:10:08" (1/1) ... [2021-05-02 20:10:08,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:10:08" (1/1) ... [2021-05-02 20:10:08,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:10:08" (1/1) ... [2021-05-02 20:10:08,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:10:08" (1/1) ... [2021-05-02 20:10:08,931 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:10:08" (1/1) ... [2021-05-02 20:10:08,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:10:08" (1/1) ... [2021-05-02 20:10:08,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:10:08" (1/1) ... [2021-05-02 20:10:08,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:10:08,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:10:08,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:10:08,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:10:08,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:10:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:10:09,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:10:09,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:10:09,001 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:10:09,001 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:10:09,001 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:10:09,001 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:10:09,001 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:10:09,001 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:10:09,001 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 20:10:09,001 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 20:10:09,002 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:10:09,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:10:09,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:10:09,002 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:10:09,003 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:10:09,003 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:10:09,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:10:09,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:10:09,003 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:10:09,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:10:09,004 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:10:09,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:10:09,201 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:10:09,201 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:10:09,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:10:09 BoogieIcfgContainer [2021-05-02 20:10:09,202 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:10:09,202 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:10:09,202 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:10:09,203 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:10:09,205 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:10:09" (1/1) ... [2021-05-02 20:10:09,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:10:09 BasicIcfg [2021-05-02 20:10:09,218 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:10:09,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:10:09,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:10:09,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:10:09,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:10:08" (1/4) ... [2021-05-02 20:10:09,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f42a3cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:10:09, skipping insertion in model container [2021-05-02 20:10:09,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:10:08" (2/4) ... [2021-05-02 20:10:09,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f42a3cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:10:09, skipping insertion in model container [2021-05-02 20:10:09,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:10:09" (3/4) ... [2021-05-02 20:10:09,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f42a3cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:10:09, skipping insertion in model container [2021-05-02 20:10:09,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:10:09" (4/4) ... [2021-05-02 20:10:09,223 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound100.iJordan [2021-05-02 20:10:09,227 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:10:09,229 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:10:09,240 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:10:09,251 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:10:09,251 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:10:09,251 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:10:09,251 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:10:09,251 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:10:09,251 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:10:09,251 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:10:09,251 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:10:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:10:09,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:10:09,263 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:10:09,264 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:10:09,264 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:10:09,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:10:09,267 INFO L82 PathProgramCache]: Analyzing trace with hash 35225450, now seen corresponding path program 1 times [2021-05-02 20:10:09,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:10:09,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174039694] [2021-05-02 20:10:09,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:10:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:10:09,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:10:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:10:09,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:10:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:10:09,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 20:10:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:10:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:10:09,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:10:09,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174039694] [2021-05-02 20:10:09,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174039694] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:10:09,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:10:09,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:10:09,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567286104] [2021-05-02 20:10:09,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:10:09,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:10:09,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:10:09,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:10:09,432 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:10:09,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:10:09,497 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-02 20:10:09,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:10:09,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:10:09,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:10:09,503 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:10:09,503 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 20:10:09,504 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:10:09,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 20:10:09,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-02 20:10:09,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:10:09,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-05-02 20:10:09,525 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2021-05-02 20:10:09,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:10:09,525 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-05-02 20:10:09,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:10:09,525 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-05-02 20:10:09,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 20:10:09,526 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:10:09,526 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:10:09,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:10:09,527 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:10:09,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:10:09,527 INFO L82 PathProgramCache]: Analyzing trace with hash 106385839, now seen corresponding path program 1 times [2021-05-02 20:10:09,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:10:09,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330760810] [2021-05-02 20:10:09,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:10:09,544 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:10:09,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397750563] [2021-05-02 20:10:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:10:09,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:10:09,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:10:09,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:09,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:09,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:09,734 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:09,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:09,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:10:09,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:10:09,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330760810] [2021-05-02 20:10:09,755 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:10:09,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397750563] [2021-05-02 20:10:09,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397750563] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:10:09,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:10:09,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:10:09,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999007414] [2021-05-02 20:10:09,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:10:09,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:10:09,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:10:09,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:10:09,757 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:10:09,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:10:09,767 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-05-02 20:10:09,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:10:09,768 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2021-05-02 20:10:09,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:10:09,768 INFO L225 Difference]: With dead ends: 30 [2021-05-02 20:10:09,768 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 20:10:09,769 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:10:09,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 20:10:09,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 20:10:09,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:10:09,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-05-02 20:10:09,773 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2021-05-02 20:10:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:10:09,774 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-05-02 20:10:09,774 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:10:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-05-02 20:10:09,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 20:10:09,774 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:10:09,774 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:10:09,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:10:09,994 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:10:09,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:10:09,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1662084126, now seen corresponding path program 1 times [2021-05-02 20:10:09,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:10:09,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791230989] [2021-05-02 20:10:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:10:10,019 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:10:10,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212089000] [2021-05-02 20:10:10,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:10:10,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:10:10,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:10:10,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:10,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:10,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:10,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:10,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:10,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:10,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:10,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:10:10,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:10:10,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791230989] [2021-05-02 20:10:10,154 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:10:10,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212089000] [2021-05-02 20:10:10,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212089000] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:10:10,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:10:10,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:10:10,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105766626] [2021-05-02 20:10:10,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:10:10,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:10:10,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:10:10,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:10:10,156 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:10:10,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:10:10,185 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-05-02 20:10:10,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:10:10,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 20:10:10,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:10:10,186 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:10:10,186 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:10:10,187 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:10:10,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:10:10,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 20:10:10,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:10:10,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-05-02 20:10:10,203 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2021-05-02 20:10:10,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:10:10,203 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-05-02 20:10:10,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:10:10,204 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-05-02 20:10:10,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 20:10:10,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:10:10,204 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:10:10,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:10,421 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:10:10,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:10:10,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1663216184, now seen corresponding path program 1 times [2021-05-02 20:10:10,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:10:10,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336676294] [2021-05-02 20:10:10,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:10:10,436 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:10:10,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841299102] [2021-05-02 20:10:10,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:10:10,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:10:10,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:10:10,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:10,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:10,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:10,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:10:10,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:10:10,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336676294] [2021-05-02 20:10:10,620 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:10:10,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841299102] [2021-05-02 20:10:10,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841299102] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:10:10,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:10:10,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:10:10,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076622836] [2021-05-02 20:10:10,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:10:10,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:10:10,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:10:10,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:10:10,621 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:10:10,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:10:10,727 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-05-02 20:10:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:10:10,727 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 20:10:10,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:10:10,728 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:10:10,728 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:10:10,728 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:10:10,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:10:10,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-02 20:10:10,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 29 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:10:10,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-05-02 20:10:10,732 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 26 [2021-05-02 20:10:10,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:10:10,732 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-05-02 20:10:10,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:10:10,733 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-05-02 20:10:10,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:10:10,733 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:10:10,733 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:10:10,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:10,950 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:10:10,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:10:10,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1664227005, now seen corresponding path program 1 times [2021-05-02 20:10:10,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:10:10,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433529495] [2021-05-02 20:10:10,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:10:10,971 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:10:10,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498015193] [2021-05-02 20:10:10,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:10:11,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:10:11,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:10:11,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:10:11,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:10:11,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433529495] [2021-05-02 20:10:11,105 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:10:11,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498015193] [2021-05-02 20:10:11,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498015193] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:10:11,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:10:11,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:10:11,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231472650] [2021-05-02 20:10:11,106 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:10:11,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:10:11,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:10:11,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:10:11,107 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:10:11,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:10:11,135 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-05-02 20:10:11,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:10:11,135 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2021-05-02 20:10:11,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:10:11,137 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:10:11,137 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 20:10:11,137 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:10:11,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 20:10:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-05-02 20:10:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 31 states have internal predecessors, (38), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:10:11,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 20:10:11,145 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 28 [2021-05-02 20:10:11,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:10:11,146 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 20:10:11,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:10:11,146 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 20:10:11,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:10:11,147 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:10:11,147 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:10:11,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:11,356 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:10:11,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:10:11,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1687306486, now seen corresponding path program 1 times [2021-05-02 20:10:11,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:10:11,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182076107] [2021-05-02 20:10:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:10:11,369 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:10:11,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059450291] [2021-05-02 20:10:11,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:10:11,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:10:11,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:10:11,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:10:11,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:10:11,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182076107] [2021-05-02 20:10:11,512 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:10:11,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059450291] [2021-05-02 20:10:11,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059450291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:10:11,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:10:11,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:10:11,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612260542] [2021-05-02 20:10:11,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:10:11,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:10:11,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:10:11,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:10:11,513 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:10:11,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:10:11,547 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-02 20:10:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:10:11,547 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 20:10:11,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:10:11,548 INFO L225 Difference]: With dead ends: 57 [2021-05-02 20:10:11,548 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 20:10:11,548 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:10:11,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 20:10:11,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-05-02 20:10:11,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.25) internal successors, (50), 41 states have internal predecessors, (50), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:10:11,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-05-02 20:10:11,552 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 29 [2021-05-02 20:10:11,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:10:11,552 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-05-02 20:10:11,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:10:11,552 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-05-02 20:10:11,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:10:11,553 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:10:11,553 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:10:11,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:10:11,767 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:10:11,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:10:11,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1686174428, now seen corresponding path program 1 times [2021-05-02 20:10:11,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:10:11,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823506318] [2021-05-02 20:10:11,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:10:11,785 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:10:11,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570022106] [2021-05-02 20:10:11,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:10:11,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:10:11,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:10:11,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:11,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:12,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:12,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:12,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:10:12,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:10:12,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823506318] [2021-05-02 20:10:12,077 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:10:12,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570022106] [2021-05-02 20:10:12,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570022106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:10:12,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:10:12,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:10:12,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290910865] [2021-05-02 20:10:12,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:10:12,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:10:12,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:10:12,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:10:12,079 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:10:12,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:10:12,266 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2021-05-02 20:10:12,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:10:12,267 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2021-05-02 20:10:12,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:10:12,267 INFO L225 Difference]: With dead ends: 67 [2021-05-02 20:10:12,267 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 20:10:12,268 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:10:12,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 20:10:12,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2021-05-02 20:10:12,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.2307692307692308) internal successors, (48), 40 states have internal predecessors, (48), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:10:12,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-05-02 20:10:12,272 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 29 [2021-05-02 20:10:12,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:10:12,272 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-05-02 20:10:12,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:10:12,272 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-05-02 20:10:12,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 20:10:12,273 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:10:12,273 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:10:12,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:12,496 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:10:12,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:10:12,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1552566600, now seen corresponding path program 1 times [2021-05-02 20:10:12,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:10:12,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136688066] [2021-05-02 20:10:12,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:10:12,510 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:10:12,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486294417] [2021-05-02 20:10:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:10:12,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 20:10:12,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:10:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:10:12,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:10:12,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136688066] [2021-05-02 20:10:12,610 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:10:12,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486294417] [2021-05-02 20:10:12,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486294417] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:10:12,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:10:12,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:10:12,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107932249] [2021-05-02 20:10:12,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:10:12,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:10:12,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:10:12,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:10:12,611 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:10:12,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:10:12,623 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-05-02 20:10:12,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:10:12,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-05-02 20:10:12,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:10:12,625 INFO L225 Difference]: With dead ends: 50 [2021-05-02 20:10:12,625 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:10:12,625 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:10:12,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:10:12,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 20:10:12,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:10:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-05-02 20:10:12,628 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 35 [2021-05-02 20:10:12,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:10:12,628 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-05-02 20:10:12,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:10:12,628 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-05-02 20:10:12,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:10:12,629 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:10:12,629 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:10:12,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:12,854 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:10:12,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:10:12,854 INFO L82 PathProgramCache]: Analyzing trace with hash 402759474, now seen corresponding path program 1 times [2021-05-02 20:10:12,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:10:12,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228228350] [2021-05-02 20:10:12,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:10:12,864 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:10:12,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [259814510] [2021-05-02 20:10:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:10:12,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:10:12,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:10:12,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:12,935 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:12,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:12,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:12,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:12,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:12,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:12,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:12,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:12,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:12,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:12,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:13,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:13,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:10:13,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:10:13,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228228350] [2021-05-02 20:10:13,026 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:10:13,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259814510] [2021-05-02 20:10:13,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259814510] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:10:13,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:10:13,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:10:13,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110629507] [2021-05-02 20:10:13,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:10:13,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:10:13,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:10:13,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:10:13,027 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:10:13,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:10:13,095 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-05-02 20:10:13,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:10:13,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-05-02 20:10:13,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:10:13,096 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:10:13,096 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:10:13,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:10:13,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:10:13,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-05-02 20:10:13,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 40 states have (on average 1.225) internal successors, (49), 41 states have internal predecessors, (49), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:10:13,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-05-02 20:10:13,100 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 38 [2021-05-02 20:10:13,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:10:13,101 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-05-02 20:10:13,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:10:13,101 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-05-02 20:10:13,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:10:13,101 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:10:13,102 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:10:13,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:10:13,316 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:10:13,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:10:13,316 INFO L82 PathProgramCache]: Analyzing trace with hash 403891532, now seen corresponding path program 1 times [2021-05-02 20:10:13,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:10:13,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916913407] [2021-05-02 20:10:13,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:10:13,326 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:10:13,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964060230] [2021-05-02 20:10:13,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:10:13,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:10:13,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:10:13,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:13,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:13,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:13,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:13,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:13,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:13,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:13,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:13,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:13,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:14,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:10:14,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:10:14,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916913407] [2021-05-02 20:10:14,673 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:10:14,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964060230] [2021-05-02 20:10:14,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964060230] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:10:14,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:10:14,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:10:14,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621651257] [2021-05-02 20:10:14,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:10:14,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:10:14,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:10:14,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:10:14,675 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:10:15,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:10:15,271 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2021-05-02 20:10:15,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:10:15,271 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2021-05-02 20:10:15,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:10:15,272 INFO L225 Difference]: With dead ends: 77 [2021-05-02 20:10:15,272 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 20:10:15,273 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 565.9ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-05-02 20:10:15,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 20:10:15,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2021-05-02 20:10:15,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 48 states have internal predecessors, (55), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:10:15,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-05-02 20:10:15,277 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 38 [2021-05-02 20:10:15,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:10:15,277 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-05-02 20:10:15,277 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:10:15,277 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-05-02 20:10:15,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 20:10:15,278 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:10:15,278 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:10:15,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:15,479 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:10:15,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:10:15,479 INFO L82 PathProgramCache]: Analyzing trace with hash -711541075, now seen corresponding path program 1 times [2021-05-02 20:10:15,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:10:15,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358685941] [2021-05-02 20:10:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:10:15,490 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:10:15,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713314156] [2021-05-02 20:10:15,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:15,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:10:15,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:10:15,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:10:15,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:15,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:15,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:15,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:15,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:15,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:15,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:15,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:15,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:15,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:15,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:10:15,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:10:15,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358685941] [2021-05-02 20:10:15,770 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:10:15,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713314156] [2021-05-02 20:10:15,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713314156] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:10:15,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:10:15,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:10:15,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211830847] [2021-05-02 20:10:15,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:10:15,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:10:15,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:10:15,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:10:15,772 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:10:15,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:10:15,824 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2021-05-02 20:10:15,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:10:15,824 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2021-05-02 20:10:15,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:10:15,826 INFO L225 Difference]: With dead ends: 65 [2021-05-02 20:10:15,826 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 20:10:15,826 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:10:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 20:10:15,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 20:10:15,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.1875) internal successors, (57), 50 states have internal predecessors, (57), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:10:15,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-05-02 20:10:15,841 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 40 [2021-05-02 20:10:15,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:10:15,841 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-05-02 20:10:15,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:10:15,842 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-05-02 20:10:15,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:10:15,842 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:10:15,843 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:10:16,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:16,044 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:10:16,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:10:16,044 INFO L82 PathProgramCache]: Analyzing trace with hash 915639449, now seen corresponding path program 2 times [2021-05-02 20:10:16,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:10:16,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091887] [2021-05-02 20:10:16,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:10:16,055 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:10:16,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760044413] [2021-05-02 20:10:16,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:16,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:10:16,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:10:16,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:10:16,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:10:16,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:10:16,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:10:16,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091887] [2021-05-02 20:10:16,224 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:10:16,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760044413] [2021-05-02 20:10:16,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760044413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:10:16,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:10:16,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:10:16,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9053471] [2021-05-02 20:10:16,224 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:10:16,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:10:16,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:10:16,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:10:16,225 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:10:16,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:10:16,279 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2021-05-02 20:10:16,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:10:16,279 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2021-05-02 20:10:16,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:10:16,281 INFO L225 Difference]: With dead ends: 72 [2021-05-02 20:10:16,281 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 20:10:16,281 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 38.6ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:10:16,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 20:10:16,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2021-05-02 20:10:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.196078431372549) internal successors, (61), 53 states have internal predecessors, (61), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:10:16,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-05-02 20:10:16,287 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 43 [2021-05-02 20:10:16,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:10:16,288 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-05-02 20:10:16,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 20:10:16,288 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-05-02 20:10:16,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:10:16,291 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:10:16,291 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:10:16,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:10:16,511 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:10:16,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:10:16,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1272338613, now seen corresponding path program 1 times [2021-05-02 20:10:16,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:10:16,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990626376] [2021-05-02 20:10:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:10:16,525 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:10:16,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [463532539] [2021-05-02 20:10:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:10:16,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:10:16,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:10:16,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:10:16,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:10:16,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990626376] [2021-05-02 20:10:16,698 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:10:16,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463532539] [2021-05-02 20:10:16,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463532539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:10:16,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:10:16,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:10:16,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398442782] [2021-05-02 20:10:16,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:10:16,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:10:16,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:10:16,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:10:16,700 INFO L87 Difference]: Start difference. First operand 68 states and 79 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:10:16,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:10:16,758 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2021-05-02 20:10:16,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:10:16,759 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2021-05-02 20:10:16,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:10:16,760 INFO L225 Difference]: With dead ends: 96 [2021-05-02 20:10:16,760 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 20:10:16,760 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:10:16,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 20:10:16,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2021-05-02 20:10:16,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.1791044776119404) internal successors, (79), 69 states have internal predecessors, (79), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:10:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2021-05-02 20:10:16,770 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 47 [2021-05-02 20:10:16,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:10:16,771 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2021-05-02 20:10:16,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:10:16,771 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2021-05-02 20:10:16,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:10:16,772 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:10:16,772 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:10:16,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:10:16,995 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:10:16,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:10:16,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1271206555, now seen corresponding path program 1 times [2021-05-02 20:10:16,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:10:16,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824410309] [2021-05-02 20:10:16,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:10:17,007 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:10:17,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175023466] [2021-05-02 20:10:17,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:10:17,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:10:17,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:10:17,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:17,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:17,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:17,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:17,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:17,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:17,753 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 23 [2021-05-02 20:10:17,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:17,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:18,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 20:10:18,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:10:18,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824410309] [2021-05-02 20:10:18,246 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:10:18,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175023466] [2021-05-02 20:10:18,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175023466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:10:18,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:10:18,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:10:18,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942879814] [2021-05-02 20:10:18,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:10:18,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:10:18,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:10:18,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:10:18,248 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:10:18,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:10:18,529 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2021-05-02 20:10:18,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:10:18,530 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 47 [2021-05-02 20:10:18,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:10:18,531 INFO L225 Difference]: With dead ends: 85 [2021-05-02 20:10:18,531 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:10:18,531 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 399.6ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:10:18,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:10:18,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 20:10:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:10:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-02 20:10:18,534 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 47 [2021-05-02 20:10:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:10:18,534 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-02 20:10:18,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 5 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:10:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-02 20:10:18,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 20:10:18,535 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:10:18,535 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:10:18,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:10:18,736 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:10:18,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:10:18,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1045240019, now seen corresponding path program 3 times [2021-05-02 20:10:18,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:10:18,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555930553] [2021-05-02 20:10:18,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:10:18,745 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:10:18,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1219400429] [2021-05-02 20:10:18,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:18,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:10:18,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:10:18,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 20:10:18,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:10:18,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:18,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:18,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:18,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-05-02 20:10:18,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:10:18,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555930553] [2021-05-02 20:10:18,922 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:10:18,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219400429] [2021-05-02 20:10:18,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219400429] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:10:18,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:10:18,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:10:18,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658313708] [2021-05-02 20:10:18,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:10:18,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:10:18,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:10:18,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:10:18,923 INFO L87 Difference]: Start difference. First operand 68 states and 78 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:10:18,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:10:18,944 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-05-02 20:10:18,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:10:18,945 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2021-05-02 20:10:18,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:10:18,945 INFO L225 Difference]: With dead ends: 65 [2021-05-02 20:10:18,945 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 20:10:18,946 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:10:18,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 20:10:18,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2021-05-02 20:10:18,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.162162162162162) internal successors, (43), 38 states have internal predecessors, (43), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:10:18,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-05-02 20:10:18,948 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 46 [2021-05-02 20:10:18,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:10:18,948 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-05-02 20:10:18,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:10:18,948 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-05-02 20:10:18,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 20:10:18,948 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:10:18,949 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:10:19,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:19,149 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:10:19,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:10:19,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1808689185, now seen corresponding path program 2 times [2021-05-02 20:10:19,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:10:19,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469040252] [2021-05-02 20:10:19,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:10:19,157 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:10:19,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1304302902] [2021-05-02 20:10:19,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:19,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:10:19,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:10:19,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:10:19,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:10:19,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:10:19,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:10:19,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469040252] [2021-05-02 20:10:19,379 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:10:19,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304302902] [2021-05-02 20:10:19,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304302902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:10:19,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:10:19,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:10:19,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431278428] [2021-05-02 20:10:19,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:10:19,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:10:19,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:10:19,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:10:19,381 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:10:19,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:10:19,437 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2021-05-02 20:10:19,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:10:19,438 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2021-05-02 20:10:19,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:10:19,439 INFO L225 Difference]: With dead ends: 94 [2021-05-02 20:10:19,439 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 20:10:19,439 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:10:19,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 20:10:19,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-05-02 20:10:19,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 57 states have internal predecessors, (65), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:10:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-05-02 20:10:19,441 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 50 [2021-05-02 20:10:19,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:10:19,441 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-05-02 20:10:19,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 20:10:19,442 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-05-02 20:10:19,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 20:10:19,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:10:19,442 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:10:19,665 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:10:19,665 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:10:19,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:10:19,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1807557127, now seen corresponding path program 2 times [2021-05-02 20:10:19,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:10:19,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000284593] [2021-05-02 20:10:19,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:10:19,673 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:10:19,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113968215] [2021-05-02 20:10:19,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:10:21,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:10:21,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:10:21,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:10:21,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:10:21,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:21,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:21,373 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-05-02 20:10:21,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:21,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:21,883 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-05-02 20:10:21,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:21,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:22,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:23,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:23,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:24,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:10:24,040 WARN L159 QuantifierPusher]: Ignoring assumption.