/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_unwindbound50.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:13:07,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:13:07,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:13:08,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:13:08,043 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:13:08,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:13:08,050 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:13:08,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:13:08,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:13:08,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:13:08,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:13:08,065 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:13:08,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:13:08,067 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:13:08,068 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:13:08,070 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:13:08,073 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:13:08,074 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:13:08,076 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:13:08,080 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:13:08,081 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:13:08,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:13:08,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:13:08,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:13:08,089 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 20:13:08,108 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:13:08,109 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:13:08,110 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:13:08,114 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:13:08,128 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:13:08,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:13:08,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:13:08,131 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:13:08,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:13:08,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:13:08,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:13:08,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:13:08,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:13:08,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:13:08,134 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:13:08,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:13:08,134 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:13:08,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:13:08,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:13:08,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:13:08,135 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:13:08,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:13:08,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:13:08,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:13:08,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:13:08,136 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:13:08,136 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:13:08,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:13:08,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:13:08,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:13:08,461 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:13:08,462 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:13:08,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound50.i [2021-05-02 20:13:08,525 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd840cce2/6a871c1da2ff48fdbd03ec29d31a890c/FLAGe692292cf [2021-05-02 20:13:08,968 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:13:08,968 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/divbin_unwindbound50.i [2021-05-02 20:13:08,974 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd840cce2/6a871c1da2ff48fdbd03ec29d31a890c/FLAGe692292cf [2021-05-02 20:13:08,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fd840cce2/6a871c1da2ff48fdbd03ec29d31a890c [2021-05-02 20:13:08,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:13:08,999 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:13:09,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:13:09,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:13:09,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:13:09,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:13:08" (1/1) ... [2021-05-02 20:13:09,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d54e018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:13:09, skipping insertion in model container [2021-05-02 20:13:09,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:13:08" (1/1) ... [2021-05-02 20:13:09,012 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:13:09,027 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:13:09,141 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_unwindbound50.i[958,971] [2021-05-02 20:13:09,158 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:13:09,165 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:13:09,210 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_unwindbound50.i[958,971] [2021-05-02 20:13:09,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:13:09,237 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:13:09,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:13:09 WrapperNode [2021-05-02 20:13:09,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:13:09,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:13:09,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:13:09,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:13:09,249 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:13:09" (1/1) ... [2021-05-02 20:13:09,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:13:09" (1/1) ... [2021-05-02 20:13:09,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:13:09" (1/1) ... [2021-05-02 20:13:09,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:13:09" (1/1) ... [2021-05-02 20:13:09,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:13:09" (1/1) ... [2021-05-02 20:13:09,276 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:13:09" (1/1) ... [2021-05-02 20:13:09,281 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:13:09" (1/1) ... [2021-05-02 20:13:09,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:13:09,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:13:09,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:13:09,284 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:13:09,285 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:13:09" (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 20:13:09,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:13:09,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:13:09,361 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:13:09,361 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:13:09,362 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:13:09,362 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:13:09,362 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:13:09,362 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:13:09,362 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 20:13:09,363 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 20:13:09,363 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:13:09,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:13:09,363 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 20:13:09,363 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:13:09,364 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:13:09,364 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:13:09,364 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:13:09,364 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:13:09,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:13:09,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:13:09,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:13:09,367 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:13:09,687 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:13:09,687 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 20:13:09,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:13:09 BoogieIcfgContainer [2021-05-02 20:13:09,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:13:09,689 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:13:09,689 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:13:09,690 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:13:09,692 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:13:09" (1/1) ... [2021-05-02 20:13:09,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:13:09 BasicIcfg [2021-05-02 20:13:09,735 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:13:09,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:13:09,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:13:09,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:13:09,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:13:08" (1/4) ... [2021-05-02 20:13:09,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a09223f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:13:09, skipping insertion in model container [2021-05-02 20:13:09,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:13:09" (2/4) ... [2021-05-02 20:13:09,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a09223f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:13:09, skipping insertion in model container [2021-05-02 20:13:09,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:13:09" (3/4) ... [2021-05-02 20:13:09,747 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a09223f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:13:09, skipping insertion in model container [2021-05-02 20:13:09,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:13:09" (4/4) ... [2021-05-02 20:13:09,748 INFO L111 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound50.iJordan [2021-05-02 20:13:09,753 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:13:09,756 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:13:09,772 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:13:09,796 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:13:09,796 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:13:09,796 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:13:09,797 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:13:09,797 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:13:09,797 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:13:09,797 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:13:09,797 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:13:09,815 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 20:13:09,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:13:09,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:13:09,823 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 20:13:09,824 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:13:09,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:13:09,829 INFO L82 PathProgramCache]: Analyzing trace with hash 35225450, now seen corresponding path program 1 times [2021-05-02 20:13:09,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:13:09,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576943704] [2021-05-02 20:13:09,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:13:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:13:10,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:13:10,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:13:10,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:13:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:13:10,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 20:13:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:13:10,126 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 20:13:10,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:13:10,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576943704] [2021-05-02 20:13:10,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576943704] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:13:10,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:13:10,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:13:10,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390821031] [2021-05-02 20:13:10,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:13:10,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:13:10,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:13:10,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:13:10,156 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 20:13:10,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:13:10,262 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-05-02 20:13:10,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:13:10,264 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 20:13:10,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:13:10,271 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:13:10,271 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 20:13:10,272 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:13:10,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 20:13:10,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-05-02 20:13:10,298 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 20:13:10,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-05-02 20:13:10,300 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 23 [2021-05-02 20:13:10,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:13:10,301 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-05-02 20:13:10,301 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 20:13:10,301 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-05-02 20:13:10,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 20:13:10,302 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:13:10,302 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 20:13:10,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:13:10,303 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:13:10,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:13:10,304 INFO L82 PathProgramCache]: Analyzing trace with hash 106385839, now seen corresponding path program 1 times [2021-05-02 20:13:10,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:13:10,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967988703] [2021-05-02 20:13:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:13:10,318 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:13:10,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380234482] [2021-05-02 20:13:10,319 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 20:13:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:13:10,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:13:10,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:13:10,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:10,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:10,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:10,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:10,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:10,535 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 20:13:10,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:13:10,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967988703] [2021-05-02 20:13:10,536 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:13:10,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380234482] [2021-05-02 20:13:10,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380234482] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:13:10,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:13:10,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:13:10,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430109601] [2021-05-02 20:13:10,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:13:10,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:13:10,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:13:10,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:13:10,539 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 20:13:10,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:13:10,550 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2021-05-02 20:13:10,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:13:10,551 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 20:13:10,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:13:10,552 INFO L225 Difference]: With dead ends: 30 [2021-05-02 20:13:10,552 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 20:13:10,553 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:13:10,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 20:13:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-05-02 20:13:10,557 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 20:13:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-05-02 20:13:10,558 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2021-05-02 20:13:10,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:13:10,559 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-05-02 20:13:10,559 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 20:13:10,559 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-05-02 20:13:10,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 20:13:10,560 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:13:10,560 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 20:13:10,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:13:10,784 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:13:10,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:13:10,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1662084126, now seen corresponding path program 1 times [2021-05-02 20:13:10,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:13:10,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667892350] [2021-05-02 20:13:10,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:13:10,804 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:13:10,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005222409] [2021-05-02 20:13:10,804 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 20:13:10,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:13:10,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:13:10,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:13:10,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:10,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:10,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:10,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:10,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:10,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:10,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:10,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:10,985 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 20:13:10,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:13:10,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667892350] [2021-05-02 20:13:10,986 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:13:10,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005222409] [2021-05-02 20:13:10,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005222409] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:13:10,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:13:10,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:13:10,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631834180] [2021-05-02 20:13:10,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:13:10,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:13:10,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:13:10,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:13:10,988 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 20:13:11,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:13:11,015 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-05-02 20:13:11,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:13:11,015 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 20:13:11,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:13:11,016 INFO L225 Difference]: With dead ends: 34 [2021-05-02 20:13:11,016 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 20:13:11,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:13:11,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 20:13:11,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 20:13:11,020 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 20:13:11,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-05-02 20:13:11,021 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 26 [2021-05-02 20:13:11,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:13:11,021 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-05-02 20:13:11,021 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 20:13:11,021 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-05-02 20:13:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 20:13:11,022 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:13:11,022 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 20:13:11,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:13:11,244 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:13:11,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:13:11,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1663216184, now seen corresponding path program 1 times [2021-05-02 20:13:11,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:13:11,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495903226] [2021-05-02 20:13:11,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:13:11,259 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:13:11,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591385160] [2021-05-02 20:13:11,259 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 20:13:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:13:11,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:13:11,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:13:11,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:11,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:11,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:11,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:11,564 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 20:13:11,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:13:11,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495903226] [2021-05-02 20:13:11,565 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:13:11,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591385160] [2021-05-02 20:13:11,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591385160] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:13:11,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:13:11,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:13:11,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253693729] [2021-05-02 20:13:11,566 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:13:11,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:13:11,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:13:11,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:13:11,567 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 20:13:11,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:13:11,740 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-05-02 20:13:11,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 20:13:11,741 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 20:13:11,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:13:11,744 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:13:11,744 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:13:11,745 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 107.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:13:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:13:11,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-05-02 20:13:11,761 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 20:13:11,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2021-05-02 20:13:11,766 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 26 [2021-05-02 20:13:11,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:13:11,766 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2021-05-02 20:13:11,766 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 20:13:11,767 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2021-05-02 20:13:11,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 20:13:11,767 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:13:11,768 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 20:13:11,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:13:11,984 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:13:11,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:13:11,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1664227005, now seen corresponding path program 1 times [2021-05-02 20:13:11,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:13:11,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249511943] [2021-05-02 20:13:11,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:13:11,995 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:13:11,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [656446235] [2021-05-02 20:13:11,996 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 20:13:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:13:12,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 20:13:12,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:13:12,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,135 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 20:13:12,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:13:12,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249511943] [2021-05-02 20:13:12,136 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:13:12,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656446235] [2021-05-02 20:13:12,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656446235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:13:12,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:13:12,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 20:13:12,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652572736] [2021-05-02 20:13:12,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:13:12,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:13:12,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:13:12,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:13:12,138 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 20:13:12,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:13:12,167 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-05-02 20:13:12,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 20:13:12,168 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 20:13:12,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:13:12,168 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:13:12,169 INFO L226 Difference]: Without dead ends: 43 [2021-05-02 20:13:12,169 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 20:13:12,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-02 20:13:12,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2021-05-02 20:13:12,172 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 20:13:12,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2021-05-02 20:13:12,173 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 28 [2021-05-02 20:13:12,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:13:12,173 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2021-05-02 20:13:12,173 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 20:13:12,173 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2021-05-02 20:13:12,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:13:12,174 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:13:12,174 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 20:13:12,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:13:12,397 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:13:12,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:13:12,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1687306486, now seen corresponding path program 1 times [2021-05-02 20:13:12,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:13:12,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522710285] [2021-05-02 20:13:12,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:13:12,414 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:13:12,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926462490] [2021-05-02 20:13:12,414 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 20:13:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:13:12,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:13:12,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:13:12,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:12,609 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 20:13:12,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:13:12,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522710285] [2021-05-02 20:13:12,610 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:13:12,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926462490] [2021-05-02 20:13:12,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926462490] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:13:12,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:13:12,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:13:12,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955403891] [2021-05-02 20:13:12,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:13:12,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:13:12,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:13:12,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:13:12,615 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 20:13:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:13:12,658 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-02 20:13:12,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:13:12,658 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 20:13:12,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:13:12,659 INFO L225 Difference]: With dead ends: 57 [2021-05-02 20:13:12,659 INFO L226 Difference]: Without dead ends: 57 [2021-05-02 20:13:12,661 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:13:12,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-05-02 20:13:12,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-05-02 20:13:12,669 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 20:13:12,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-05-02 20:13:12,672 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 29 [2021-05-02 20:13:12,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:13:12,673 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-05-02 20:13:12,673 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 20:13:12,674 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-05-02 20:13:12,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:13:12,679 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:13:12,680 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 20:13:12,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:13:12,893 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:13:12,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:13:12,893 INFO L82 PathProgramCache]: Analyzing trace with hash -1686174428, now seen corresponding path program 1 times [2021-05-02 20:13:12,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:13:12,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476679259] [2021-05-02 20:13:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:13:12,906 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:13:12,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958146870] [2021-05-02 20:13:12,906 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 20:13:12,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:13:12,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 20:13:12,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:13:13,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:13,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:13,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:13,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:13,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:13,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:13,183 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 20:13:13,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:13:13,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476679259] [2021-05-02 20:13:13,184 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:13:13,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958146870] [2021-05-02 20:13:13,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958146870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:13:13,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:13:13,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:13:13,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382582387] [2021-05-02 20:13:13,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:13:13,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:13:13,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:13:13,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:13:13,186 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 20:13:13,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:13:13,383 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2021-05-02 20:13:13,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:13:13,384 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 20:13:13,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:13:13,384 INFO L225 Difference]: With dead ends: 67 [2021-05-02 20:13:13,384 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 20:13:13,385 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:13:13,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 20:13:13,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2021-05-02 20:13:13,388 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 20:13:13,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-05-02 20:13:13,389 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 29 [2021-05-02 20:13:13,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:13:13,389 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-05-02 20:13:13,389 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 20:13:13,389 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-05-02 20:13:13,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-05-02 20:13:13,390 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:13:13,390 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 20:13:13,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:13:13,601 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:13:13,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:13:13,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1552566600, now seen corresponding path program 1 times [2021-05-02 20:13:13,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:13:13,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943021944] [2021-05-02 20:13:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:13:13,616 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:13:13,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935938487] [2021-05-02 20:13:13,616 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 20:13:13,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:13:13,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-02 20:13:13,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:13:13,740 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 20:13:13,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:13:13,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943021944] [2021-05-02 20:13:13,740 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:13:13,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935938487] [2021-05-02 20:13:13,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935938487] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:13:13,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:13:13,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:13:13,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555975400] [2021-05-02 20:13:13,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:13:13,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:13:13,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:13:13,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:13:13,742 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 20:13:13,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:13:13,756 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2021-05-02 20:13:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:13:13,756 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 20:13:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:13:13,757 INFO L225 Difference]: With dead ends: 50 [2021-05-02 20:13:13,757 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 20:13:13,757 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:13:13,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 20:13:13,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-05-02 20:13:13,759 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 20:13:13,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2021-05-02 20:13:13,759 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 35 [2021-05-02 20:13:13,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:13:13,760 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2021-05-02 20:13:13,760 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 20:13:13,760 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2021-05-02 20:13:13,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:13:13,760 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:13:13,760 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 20:13:13,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:13:13,969 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:13:13,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:13:13,970 INFO L82 PathProgramCache]: Analyzing trace with hash 402759474, now seen corresponding path program 1 times [2021-05-02 20:13:13,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:13:13,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250359369] [2021-05-02 20:13:13,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:13:13,986 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:13:13,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1509359005] [2021-05-02 20:13:13,987 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 20:13:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:13:14,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:13:14,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:13:14,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,147 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 20:13:14,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:13:14,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250359369] [2021-05-02 20:13:14,148 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:13:14,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509359005] [2021-05-02 20:13:14,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509359005] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:13:14,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:13:14,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:13:14,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387650715] [2021-05-02 20:13:14,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:13:14,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:13:14,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:13:14,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:13:14,150 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 20:13:14,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:13:14,198 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2021-05-02 20:13:14,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:13:14,198 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 20:13:14,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:13:14,199 INFO L225 Difference]: With dead ends: 60 [2021-05-02 20:13:14,199 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:13:14,199 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:13:14,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:13:14,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-05-02 20:13:14,202 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 20:13:14,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-05-02 20:13:14,203 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 38 [2021-05-02 20:13:14,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:13:14,203 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-05-02 20:13:14,203 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 20:13:14,203 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-05-02 20:13:14,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 20:13:14,209 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:13:14,209 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 20:13:14,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:13:14,425 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:13:14,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:13:14,425 INFO L82 PathProgramCache]: Analyzing trace with hash 403891532, now seen corresponding path program 1 times [2021-05-02 20:13:14,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:13:14,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069518031] [2021-05-02 20:13:14,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:13:14,437 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:13:14,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1885777664] [2021-05-02 20:13:14,438 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 20:13:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:13:14,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:13:14,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:13:14,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:14,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:15,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:15,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:15,819 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 20:13:15,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:13:15,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069518031] [2021-05-02 20:13:15,820 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:13:15,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885777664] [2021-05-02 20:13:15,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885777664] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:13:15,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:13:15,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:13:15,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845677058] [2021-05-02 20:13:15,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:13:15,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:13:15,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:13:15,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:13:15,822 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 20:13:16,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:13:16,427 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2021-05-02 20:13:16,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 20:13:16,428 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 20:13:16,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:13:16,429 INFO L225 Difference]: With dead ends: 77 [2021-05-02 20:13:16,429 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 20:13:16,429 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 579.0ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-05-02 20:13:16,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 20:13:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2021-05-02 20:13:16,433 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 20:13:16,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-05-02 20:13:16,433 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 38 [2021-05-02 20:13:16,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:13:16,434 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-05-02 20:13:16,434 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 20:13:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-05-02 20:13:16,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 20:13:16,435 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:13:16,435 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 20:13:16,635 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:13:16,636 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:13:16,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:13:16,636 INFO L82 PathProgramCache]: Analyzing trace with hash -711541075, now seen corresponding path program 1 times [2021-05-02 20:13:16,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:13:16,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321826772] [2021-05-02 20:13:16,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:13:16,649 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:13:16,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [320324413] [2021-05-02 20:13:16,650 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 20:13:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:13:16,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 20:13:16,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:13:16,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:16,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:16,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:16,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:16,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:16,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:16,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:16,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:16,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:16,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:16,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:16,832 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 20:13:16,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:13:16,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321826772] [2021-05-02 20:13:16,833 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:13:16,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320324413] [2021-05-02 20:13:16,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320324413] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:13:16,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:13:16,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 20:13:16,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861627855] [2021-05-02 20:13:16,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 20:13:16,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:13:16,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 20:13:16,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:13:16,834 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 20:13:16,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:13:16,873 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2021-05-02 20:13:16,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:13:16,873 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 20:13:16,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:13:16,875 INFO L225 Difference]: With dead ends: 65 [2021-05-02 20:13:16,875 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 20:13:16,875 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 24.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:13:16,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 20:13:16,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 20:13:16,878 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 20:13:16,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2021-05-02 20:13:16,879 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 40 [2021-05-02 20:13:16,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:13:16,879 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2021-05-02 20:13:16,879 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 20:13:16,879 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2021-05-02 20:13:16,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 20:13:16,880 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:13:16,880 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 20:13:17,097 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:13:17,097 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:13:17,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:13:17,098 INFO L82 PathProgramCache]: Analyzing trace with hash 915639449, now seen corresponding path program 2 times [2021-05-02 20:13:17,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:13:17,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738885729] [2021-05-02 20:13:17,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:13:17,107 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:13:17,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1507292926] [2021-05-02 20:13:17,108 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 20:13:17,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:13:17,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:13:17,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 20:13:17,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:13:17,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,276 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 20:13:17,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:13:17,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738885729] [2021-05-02 20:13:17,277 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:13:17,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507292926] [2021-05-02 20:13:17,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507292926] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:13:17,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:13:17,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:13:17,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774004305] [2021-05-02 20:13:17,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:13:17,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:13:17,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:13:17,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:13:17,279 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 20:13:17,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:13:17,338 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2021-05-02 20:13:17,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:13:17,339 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 20:13:17,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:13:17,340 INFO L225 Difference]: With dead ends: 72 [2021-05-02 20:13:17,341 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 20:13:17,341 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:13:17,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 20:13:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2021-05-02 20:13:17,349 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 20:13:17,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 79 transitions. [2021-05-02 20:13:17,350 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 79 transitions. Word has length 43 [2021-05-02 20:13:17,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:13:17,351 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 79 transitions. [2021-05-02 20:13:17,351 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 20:13:17,351 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 79 transitions. [2021-05-02 20:13:17,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:13:17,352 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:13:17,352 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 20:13:17,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:13:17,566 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:13:17,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:13:17,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1272338613, now seen corresponding path program 1 times [2021-05-02 20:13:17,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:13:17,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702684345] [2021-05-02 20:13:17,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:13:17,581 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:13:17,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306769772] [2021-05-02 20:13:17,582 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 20:13:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:13:17,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 20:13:17,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:13:17,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:17,757 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 20:13:17,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:13:17,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702684345] [2021-05-02 20:13:17,758 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:13:17,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306769772] [2021-05-02 20:13:17,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306769772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:13:17,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:13:17,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:13:17,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168541914] [2021-05-02 20:13:17,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:13:17,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:13:17,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:13:17,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:13:17,761 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 20:13:17,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:13:17,821 INFO L93 Difference]: Finished difference Result 96 states and 111 transitions. [2021-05-02 20:13:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:13:17,822 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 20:13:17,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:13:17,822 INFO L225 Difference]: With dead ends: 96 [2021-05-02 20:13:17,823 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 20:13:17,823 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:13:17,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 20:13:17,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2021-05-02 20:13:17,826 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 20:13:17,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2021-05-02 20:13:17,827 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 47 [2021-05-02 20:13:17,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:13:17,827 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2021-05-02 20:13:17,827 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 20:13:17,827 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2021-05-02 20:13:17,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:13:17,828 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:13:17,828 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 20:13:18,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:13:18,043 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:13:18,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:13:18,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1271206555, now seen corresponding path program 1 times [2021-05-02 20:13:18,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:13:18,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370971097] [2021-05-02 20:13:18,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:13:18,050 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:13:18,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048305157] [2021-05-02 20:13:18,057 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 20:13:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:13:18,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 20:13:18,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:13:18,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:18,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:18,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:18,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:18,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:18,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:18,770 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 23 [2021-05-02 20:13:18,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:18,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:19,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:19,205 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 20:13:19,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:13:19,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370971097] [2021-05-02 20:13:19,205 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:13:19,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048305157] [2021-05-02 20:13:19,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048305157] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:13:19,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:13:19,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:13:19,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292158351] [2021-05-02 20:13:19,206 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:13:19,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:13:19,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:13:19,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:13:19,207 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 20:13:19,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:13:19,473 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2021-05-02 20:13:19,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:13:19,474 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 20:13:19,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:13:19,474 INFO L225 Difference]: With dead ends: 85 [2021-05-02 20:13:19,475 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 20:13:19,475 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 378.2ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:13:19,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 20:13:19,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-05-02 20:13:19,477 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 20:13:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 78 transitions. [2021-05-02 20:13:19,478 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 78 transitions. Word has length 47 [2021-05-02 20:13:19,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:13:19,478 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 78 transitions. [2021-05-02 20:13:19,478 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 20:13:19,478 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 78 transitions. [2021-05-02 20:13:19,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 20:13:19,479 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:13:19,479 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 20:13:19,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 20:13:19,682 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:13:19,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:13:19,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1045240019, now seen corresponding path program 3 times [2021-05-02 20:13:19,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:13:19,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353872502] [2021-05-02 20:13:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:13:19,691 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:13:19,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1594163484] [2021-05-02 20:13:19,691 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 20:13:19,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 20:13:19,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:13:19,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 20:13:19,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:13:19,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:19,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:19,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:19,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:19,833 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 20:13:19,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:13:19,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353872502] [2021-05-02 20:13:19,833 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:13:19,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594163484] [2021-05-02 20:13:19,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594163484] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:13:19,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:13:19,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 20:13:19,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370066460] [2021-05-02 20:13:19,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 20:13:19,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:13:19,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 20:13:19,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:13:19,835 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 20:13:19,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:13:19,857 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2021-05-02 20:13:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:13:19,858 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 20:13:19,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:13:19,859 INFO L225 Difference]: With dead ends: 65 [2021-05-02 20:13:19,859 INFO L226 Difference]: Without dead ends: 63 [2021-05-02 20:13:19,859 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 20:13:19,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-05-02 20:13:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2021-05-02 20:13:19,861 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 20:13:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2021-05-02 20:13:19,862 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 46 [2021-05-02 20:13:19,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:13:19,862 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2021-05-02 20:13:19,862 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 20:13:19,862 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2021-05-02 20:13:19,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 20:13:19,863 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:13:19,863 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 20:13:20,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:13:20,086 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:13:20,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:13:20,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1808689185, now seen corresponding path program 2 times [2021-05-02 20:13:20,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:13:20,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675931896] [2021-05-02 20:13:20,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:13:20,094 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:13:20,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1940754124] [2021-05-02 20:13:20,094 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 20:13:20,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:13:20,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:13:20,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:13:20,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:13:20,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:20,317 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 20:13:20,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:13:20,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675931896] [2021-05-02 20:13:20,318 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:13:20,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940754124] [2021-05-02 20:13:20,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940754124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:13:20,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:13:20,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 20:13:20,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200225648] [2021-05-02 20:13:20,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 20:13:20,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:13:20,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 20:13:20,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:13:20,320 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 20:13:20,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:13:20,385 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2021-05-02 20:13:20,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:13:20,385 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 20:13:20,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:13:20,388 INFO L225 Difference]: With dead ends: 94 [2021-05-02 20:13:20,388 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 20:13:20,388 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.2ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:13:20,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 20:13:20,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2021-05-02 20:13:20,391 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 20:13:20,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-05-02 20:13:20,392 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 50 [2021-05-02 20:13:20,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:13:20,392 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-05-02 20:13:20,393 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 20:13:20,393 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-05-02 20:13:20,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 20:13:20,393 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:13:20,393 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 20:13:20,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 20:13:20,618 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:13:20,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:13:20,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1807557127, now seen corresponding path program 2 times [2021-05-02 20:13:20,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:13:20,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537677194] [2021-05-02 20:13:20,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:13:20,623 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:13:20,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518413465] [2021-05-02 20:13:20,623 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 20:13:21,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:13:21,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:13:21,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 20:13:21,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:13:21,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:21,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:21,929 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-05-02 20:13:21,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:21,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:22,371 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2021-05-02 20:13:22,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:22,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:23,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:24,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:24,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:24,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:13:24,551 WARN L159 QuantifierPusher]: Ignoring assumption.