/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ifeqn3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:38:37,524 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:38:37,526 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:38:37,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:38:37,541 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:38:37,542 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:38:37,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:38:37,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:38:37,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:38:37,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:38:37,550 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:38:37,551 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:38:37,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:38:37,553 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:38:37,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:38:37,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:38:37,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:38:37,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:38:37,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:38:37,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:38:37,564 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:38:37,565 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:38:37,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:38:37,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:38:37,572 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:38:37,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:38:37,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:38:37,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:38:37,584 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 01:38:37,607 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:38:37,607 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:38:37,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:38:37,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:38:37,609 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:38:37,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:38:37,610 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:38:37,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:38:37,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:38:37,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:38:37,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:38:37,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:38:37,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:38:37,611 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:38:37,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:38:37,612 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:38:37,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:38:37,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:38:37,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:38:37,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:38:37,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:38:37,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:38:37,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:38:37,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:38:37,614 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:38:37,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:38:37,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:37,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:38:37,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:38:37,615 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 01:38:37,931 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:38:37,946 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:38:37,951 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:38:37,952 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:38:37,953 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:38:37,953 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ifeqn3f.c [2020-07-21 01:38:38,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c470a07ad/f52027b117e7443ab82b781cb08236c2/FLAG229901fa2 [2020-07-21 01:38:38,593 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:38:38,594 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ifeqn3f.c [2020-07-21 01:38:38,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c470a07ad/f52027b117e7443ab82b781cb08236c2/FLAG229901fa2 [2020-07-21 01:38:38,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c470a07ad/f52027b117e7443ab82b781cb08236c2 [2020-07-21 01:38:38,958 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:38:38,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:38:38,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:38:38,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:38:38,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:38:38,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:38:38" (1/1) ... [2020-07-21 01:38:38,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71cf0309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:38, skipping insertion in model container [2020-07-21 01:38:38,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:38:38" (1/1) ... [2020-07-21 01:38:38,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:38:38,999 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:38:39,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:38:39,216 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:38:39,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:38:39,252 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:38:39,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:39 WrapperNode [2020-07-21 01:38:39,252 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:38:39,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:38:39,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:38:39,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:38:39,264 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:39" (1/1) ... [2020-07-21 01:38:39,264 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:39" (1/1) ... [2020-07-21 01:38:39,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:39" (1/1) ... [2020-07-21 01:38:39,374 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:39" (1/1) ... [2020-07-21 01:38:39,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:39" (1/1) ... [2020-07-21 01:38:39,390 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:39" (1/1) ... [2020-07-21 01:38:39,392 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:39" (1/1) ... [2020-07-21 01:38:39,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:38:39,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:38:39,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:38:39,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:38:39,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:39" (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 [2020-07-21 01:38:39,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:38:39,479 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:38:39,480 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:38:39,480 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:38:39,480 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:38:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:38:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:38:39,481 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:38:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:38:39,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:38:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 01:38:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:38:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 01:38:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 01:38:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 01:38:39,483 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:38:39,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:38:39,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:38:39,823 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:38:39,824 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 01:38:39,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:38:39 BoogieIcfgContainer [2020-07-21 01:38:39,829 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:38:39,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:38:39,831 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:38:39,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:38:39,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:38:38" (1/3) ... [2020-07-21 01:38:39,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f105dec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:38:39, skipping insertion in model container [2020-07-21 01:38:39,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:39" (2/3) ... [2020-07-21 01:38:39,837 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f105dec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:38:39, skipping insertion in model container [2020-07-21 01:38:39,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:38:39" (3/3) ... [2020-07-21 01:38:39,839 INFO L109 eAbstractionObserver]: Analyzing ICFG ifeqn3f.c [2020-07-21 01:38:39,850 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:38:39,860 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:38:39,877 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:38:39,903 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:38:39,904 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:38:39,904 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:38:39,904 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:38:39,904 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:38:39,904 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:38:39,904 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:38:39,905 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:38:39,926 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-07-21 01:38:39,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 01:38:39,933 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:39,934 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:38:39,934 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:39,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:39,940 INFO L82 PathProgramCache]: Analyzing trace with hash -294712258, now seen corresponding path program 1 times [2020-07-21 01:38:39,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:39,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136241421] [2020-07-21 01:38:39,948 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:40,066 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:38:40,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:40,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:38:40,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:38:40,102 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:38:40,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136241421] [2020-07-21 01:38:40,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:38:40,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:38:40,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300063070] [2020-07-21 01:38:40,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:38:40,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:40,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:38:40,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:38:40,132 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 2 states. [2020-07-21 01:38:40,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:40,162 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-07-21 01:38:40,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:38:40,164 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-21 01:38:40,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:40,175 INFO L225 Difference]: With dead ends: 62 [2020-07-21 01:38:40,175 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 01:38:40,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:38:40,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 01:38:40,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-07-21 01:38:40,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-21 01:38:40,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-07-21 01:38:40,228 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-07-21 01:38:40,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:40,229 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-07-21 01:38:40,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:38:40,229 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-07-21 01:38:40,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 01:38:40,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:40,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:38:40,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:40,447 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:40,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:40,448 INFO L82 PathProgramCache]: Analyzing trace with hash -2054124171, now seen corresponding path program 1 times [2020-07-21 01:38:40,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:40,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838990901] [2020-07-21 01:38:40,450 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:40,521 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:38:40,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:40,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:38:40,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:38:40,579 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:38:40,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838990901] [2020-07-21 01:38:40,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:38:40,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:38:40,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992854573] [2020-07-21 01:38:40,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:38:40,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:40,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:38:40,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:38:40,584 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 4 states. [2020-07-21 01:38:40,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:40,696 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2020-07-21 01:38:40,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:38:40,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-21 01:38:40,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:40,701 INFO L225 Difference]: With dead ends: 56 [2020-07-21 01:38:40,701 INFO L226 Difference]: Without dead ends: 41 [2020-07-21 01:38:40,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:38:40,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-07-21 01:38:40,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-07-21 01:38:40,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 01:38:40,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-21 01:38:40,716 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-07-21 01:38:40,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:40,717 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-21 01:38:40,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:38:40,717 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-21 01:38:40,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 01:38:40,718 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:40,718 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:38:40,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:40,932 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:40,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:40,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1477618916, now seen corresponding path program 1 times [2020-07-21 01:38:40,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:40,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570060453] [2020-07-21 01:38:40,935 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:41,018 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:38:41,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:41,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 01:38:41,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:41,092 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 01:38:41,093 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:38:41,098 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:38:41,099 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:38:41,100 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-07-21 01:38:41,152 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:38:41,153 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2020-07-21 01:38:41,154 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-07-21 01:38:41,169 INFO L624 ElimStorePlain]: treesize reduction 9, result has 43.8 percent of original size [2020-07-21 01:38:41,170 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:38:41,170 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:7 [2020-07-21 01:38:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 01:38:41,208 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:38:41,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570060453] [2020-07-21 01:38:41,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:38:41,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 01:38:41,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180363010] [2020-07-21 01:38:41,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 01:38:41,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:41,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 01:38:41,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-21 01:38:41,211 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-07-21 01:38:41,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:41,428 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-07-21 01:38:41,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 01:38:41,429 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2020-07-21 01:38:41,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:41,431 INFO L225 Difference]: With dead ends: 52 [2020-07-21 01:38:41,431 INFO L226 Difference]: Without dead ends: 50 [2020-07-21 01:38:41,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:38:41,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-21 01:38:41,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-07-21 01:38:41,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-21 01:38:41,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-07-21 01:38:41,462 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 28 [2020-07-21 01:38:41,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:41,463 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-07-21 01:38:41,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 01:38:41,466 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-07-21 01:38:41,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 01:38:41,467 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:41,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:38:41,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:41,682 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:41,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:41,682 INFO L82 PathProgramCache]: Analyzing trace with hash -797560546, now seen corresponding path program 1 times [2020-07-21 01:38:41,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:41,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805355808] [2020-07-21 01:38:41,684 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:41,746 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:38:41,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:41,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:38:41,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 01:38:41,763 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:38:41,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805355808] [2020-07-21 01:38:41,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:38:41,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 01:38:41,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451936356] [2020-07-21 01:38:41,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 01:38:41,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:41,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 01:38:41,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:38:41,766 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 3 states. [2020-07-21 01:38:41,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:41,815 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-07-21 01:38:41,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 01:38:41,816 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-07-21 01:38:41,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:41,817 INFO L225 Difference]: With dead ends: 74 [2020-07-21 01:38:41,818 INFO L226 Difference]: Without dead ends: 45 [2020-07-21 01:38:41,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 01:38:41,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-21 01:38:41,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-07-21 01:38:41,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-21 01:38:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-07-21 01:38:41,828 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 28 [2020-07-21 01:38:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:41,828 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-07-21 01:38:41,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 01:38:41,829 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-07-21 01:38:41,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-07-21 01:38:41,830 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:41,830 INFO L422 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:38:42,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:42,045 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:42,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:42,046 INFO L82 PathProgramCache]: Analyzing trace with hash -622618382, now seen corresponding path program 1 times [2020-07-21 01:38:42,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:42,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941507273] [2020-07-21 01:38:42,047 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:42,109 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:38:42,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:42,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 01:38:42,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:42,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 01:38:42,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:38:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 01:38:42,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941507273] [2020-07-21 01:38:42,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 01:38:42,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 01:38:42,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250110167] [2020-07-21 01:38:42,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 01:38:42,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:42,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 01:38:42,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 01:38:42,278 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 9 states. [2020-07-21 01:38:42,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:42,523 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-07-21 01:38:42,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 01:38:42,525 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-07-21 01:38:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:42,529 INFO L225 Difference]: With dead ends: 91 [2020-07-21 01:38:42,530 INFO L226 Difference]: Without dead ends: 55 [2020-07-21 01:38:42,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 01:38:42,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-07-21 01:38:42,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-07-21 01:38:42,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 01:38:42,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-07-21 01:38:42,555 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-07-21 01:38:42,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:42,556 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-07-21 01:38:42,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 01:38:42,557 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-07-21 01:38:42,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-21 01:38:42,561 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:42,561 INFO L422 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, 1, 1, 1, 1] [2020-07-21 01:38:42,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:42,763 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:42,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:42,764 INFO L82 PathProgramCache]: Analyzing trace with hash 60389999, now seen corresponding path program 1 times [2020-07-21 01:38:42,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:42,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786395330] [2020-07-21 01:38:42,765 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:42,828 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:38:42,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:42,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjunts are in the unsatisfiable core [2020-07-21 01:38:42,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:42,853 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-07-21 01:38:42,854 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:38:42,862 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:38:42,863 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:38:42,864 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8 [2020-07-21 01:38:42,889 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 01:38:42,890 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:38:42,900 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:38:42,901 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:38:42,901 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2020-07-21 01:38:42,977 INFO L350 Elim1Store]: treesize reduction 23, result has 23.3 percent of original size [2020-07-21 01:38:42,979 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2020-07-21 01:38:42,982 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:38:42,992 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:38:42,993 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:38:42,994 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-07-21 01:38:43,067 INFO L350 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2020-07-21 01:38:43,071 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2020-07-21 01:38:43,073 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:38:43,088 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:38:43,089 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:38:43,089 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:41, output treesize:37 [2020-07-21 01:38:43,169 INFO L350 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2020-07-21 01:38:43,169 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 46 [2020-07-21 01:38:43,171 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:38:43,187 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 01:38:43,191 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-07-21 01:38:43,192 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:53 [2020-07-21 01:38:46,053 INFO L350 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2020-07-21 01:38:46,054 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 46 [2020-07-21 01:38:46,056 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 01:38:46,074 INFO L624 ElimStorePlain]: treesize reduction 23, result has 32.4 percent of original size [2020-07-21 01:38:46,074 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 01:38:46,075 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:67, output treesize:7 [2020-07-21 01:38:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:38:46,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 01:38:46,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 01:39:18,409 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 25 [2020-07-21 01:39:28,515 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-07-21 01:39:51,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786395330] [2020-07-21 01:39:51,663 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-07-21 01:39:51,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:39:51,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-07-21 01:39:51,663 ERROR L206 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible [2020-07-21 01:39:51,664 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:39:51,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:39:51,889 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-07-21 01:39:51,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:39:51 BoogieIcfgContainer [2020-07-21 01:39:51,890 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:39:51,892 INFO L168 Benchmark]: Toolchain (without parser) took 72931.58 ms. Allocated memory was 144.7 MB in the beginning and 248.0 MB in the end (delta: 103.3 MB). Free memory was 101.2 MB in the beginning and 127.8 MB in the end (delta: -26.5 MB). Peak memory consumption was 76.8 MB. Max. memory is 7.1 GB. [2020-07-21 01:39:51,893 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 01:39:51,893 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.69 ms. Allocated memory is still 144.7 MB. Free memory was 100.8 MB in the beginning and 90.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:39:51,894 INFO L168 Benchmark]: Boogie Preprocessor took 141.72 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 90.4 MB in the beginning and 180.4 MB in the end (delta: -90.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:39:51,898 INFO L168 Benchmark]: RCFGBuilder took 433.62 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 162.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-07-21 01:39:51,899 INFO L168 Benchmark]: TraceAbstraction took 72059.63 ms. Allocated memory was 202.4 MB in the beginning and 248.0 MB in the end (delta: 45.6 MB). Free memory was 162.2 MB in the beginning and 127.8 MB in the end (delta: 34.4 MB). Peak memory consumption was 80.0 MB. Max. memory is 7.1 GB. [2020-07-21 01:39:51,905 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.4 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 289.69 ms. Allocated memory is still 144.7 MB. Free memory was 100.8 MB in the beginning and 90.4 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 141.72 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 90.4 MB in the beginning and 180.4 MB in the end (delta: -90.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 433.62 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 162.9 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 72059.63 ms. Allocated memory was 202.4 MB in the beginning and 248.0 MB in the end (delta: 45.6 MB). Free memory was 162.2 MB in the beginning and 127.8 MB in the end (delta: 34.4 MB). Peak memory consumption was 80.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 13]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long *a = malloc(sizeof(long long)*N); [L27] long long *b = malloc(sizeof(long long)*N); [L29] i=0 [L29] COND TRUE i