/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:53:11,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 01:53:11,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 01:53:11,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 01:53:11,707 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 01:53:11,710 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 01:53:11,711 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 01:53:11,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 01:53:11,722 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 01:53:11,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 01:53:11,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 01:53:11,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 01:53:11,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:53:11,726 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:53:11,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:53:11,731 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:53:11,733 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:53:11,735 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:53:11,737 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:53:11,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:53:11,745 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:53:11,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:53:11,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:53:11,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:53:11,753 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 01:53:11,753 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 01:53:11,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 01:53:11,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 01:53:11,756 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 01:53:11,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-20 01:53:11,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:53:11,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:53:11,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:53:11,767 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 [2020-07-20 01:53:11,801 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:53:11,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:53:11,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:53:11,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:53:11,807 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:53:11,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:53:11,807 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:53:11,809 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:53:11,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:53:11,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:53:11,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:53:11,810 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:53:11,810 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:53:11,810 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:53:11,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:53:11,811 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:53:11,811 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:53:11,811 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:53:11,811 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:53:11,812 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:53:11,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:53:11,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:53:11,812 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:53:11,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:53:11,813 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:53:11,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:53:11,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:53:11,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:53:11,813 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:53:11,813 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES 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 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:53:12,081 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:53:12,093 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:53:12,097 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:53:12,098 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:53:12,098 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:53:12,099 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/ofuf_3.c [2020-07-20 01:53:12,159 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38d80db65/20291edc809d4d2184fd72bf135303fe/FLAG2f2b992d9 [2020-07-20 01:53:12,644 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:53:12,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/ofuf_3.c [2020-07-20 01:53:12,655 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38d80db65/20291edc809d4d2184fd72bf135303fe/FLAG2f2b992d9 [2020-07-20 01:53:12,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38d80db65/20291edc809d4d2184fd72bf135303fe [2020-07-20 01:53:12,997 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:53:12,999 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:53:13,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:53:13,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:53:13,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:53:13,004 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:53:12" (1/1) ... [2020-07-20 01:53:13,007 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24c7ba21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13, skipping insertion in model container [2020-07-20 01:53:13,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:53:12" (1/1) ... [2020-07-20 01:53:13,015 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:53:13,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:53:13,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:53:13,473 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:53:13,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:53:13,566 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:53:13,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13 WrapperNode [2020-07-20 01:53:13,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:53:13,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:53:13,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:53:13,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:53:13,578 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13" (1/1) ... [2020-07-20 01:53:13,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13" (1/1) ... [2020-07-20 01:53:13,599 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13" (1/1) ... [2020-07-20 01:53:13,599 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13" (1/1) ... [2020-07-20 01:53:13,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13" (1/1) ... [2020-07-20 01:53:13,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13" (1/1) ... [2020-07-20 01:53:13,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13" (1/1) ... [2020-07-20 01:53:13,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:53:13,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:53:13,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:53:13,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:53:13,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13" (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 [2020-07-20 01:53:13,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:53:13,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:53:13,725 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 01:53:13,726 INFO L138 BoogieDeclarations]: Found implementation of procedure avoid_zero [2020-07-20 01:53:13,726 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_89 [2020-07-20 01:53:13,726 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_92 [2020-07-20 01:53:13,727 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_95 [2020-07-20 01:53:13,727 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_96 [2020-07-20 01:53:13,727 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_97 [2020-07-20 01:53:13,727 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_99 [2020-07-20 01:53:13,728 INFO L138 BoogieDeclarations]: Found implementation of procedure Id_MCDC_100 [2020-07-20 01:53:13,729 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:53:13,729 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 01:53:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:53:13,729 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 01:53:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 01:53:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure avoid_zero [2020-07-20 01:53:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2020-07-20 01:53:13,730 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2020-07-20 01:53:13,731 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_92 [2020-07-20 01:53:13,731 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_95 [2020-07-20 01:53:13,731 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_96 [2020-07-20 01:53:13,731 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_97 [2020-07-20 01:53:13,731 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 01:53:13,732 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_99 [2020-07-20 01:53:13,732 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_100 [2020-07-20 01:53:13,732 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2020-07-20 01:53:13,733 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:53:13,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 01:53:13,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 01:53:13,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-20 01:53:13,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 01:53:13,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-20 01:53:13,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 01:53:13,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 01:53:13,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 01:53:13,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-20 01:53:13,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:53:13,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-07-20 01:53:13,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:53:14,626 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:53:14,627 INFO L295 CfgBuilder]: Removed 7 assume(true) statements. [2020-07-20 01:53:14,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:53:14 BoogieIcfgContainer [2020-07-20 01:53:14,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:53:14,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:53:14,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:53:14,637 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:53:14,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:53:12" (1/3) ... [2020-07-20 01:53:14,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbd11d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:53:14, skipping insertion in model container [2020-07-20 01:53:14,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:53:13" (2/3) ... [2020-07-20 01:53:14,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbd11d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:53:14, skipping insertion in model container [2020-07-20 01:53:14,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:53:14" (3/3) ... [2020-07-20 01:53:14,641 INFO L109 eAbstractionObserver]: Analyzing ICFG ofuf_3.c [2020-07-20 01:53:14,651 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:53:14,659 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:53:14,669 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:53:14,688 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:53:14,689 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:53:14,689 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:53:14,689 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:53:14,689 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:53:14,689 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:53:14,690 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:53:14,690 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:53:14,710 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2020-07-20 01:53:14,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 01:53:14,719 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:53:14,720 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:53:14,720 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:53:14,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:53:14,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1652927245, now seen corresponding path program 1 times [2020-07-20 01:53:14,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:53:14,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056723750] [2020-07-20 01:53:14,735 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79480ab [2020-07-20 01:53:14,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:15,204 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-20 01:53:15,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:15,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:53:15,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056723750] [2020-07-20 01:53:15,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:53:15,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:53:15,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886362520] [2020-07-20 01:53:15,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:53:15,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:53:15,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:53:15,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:53:15,374 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 5 states. [2020-07-20 01:53:15,534 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 01:53:16,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:53:16,700 INFO L93 Difference]: Finished difference Result 264 states and 405 transitions. [2020-07-20 01:53:16,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 01:53:16,704 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2020-07-20 01:53:16,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:53:16,728 INFO L225 Difference]: With dead ends: 264 [2020-07-20 01:53:16,728 INFO L226 Difference]: Without dead ends: 140 [2020-07-20 01:53:16,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:53:16,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-20 01:53:16,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 120. [2020-07-20 01:53:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 01:53:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 166 transitions. [2020-07-20 01:53:16,837 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 166 transitions. Word has length 39 [2020-07-20 01:53:16,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:53:16,838 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 166 transitions. [2020-07-20 01:53:16,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:53:16,838 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 166 transitions. [2020-07-20 01:53:16,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-20 01:53:16,842 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:53:16,842 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:53:16,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:53:16,843 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:53:16,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:53:16,843 INFO L82 PathProgramCache]: Analyzing trace with hash -296822387, now seen corresponding path program 1 times [2020-07-20 01:53:16,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:53:16,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987284288] [2020-07-20 01:53:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79480ab [2020-07-20 01:53:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:17,062 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-20 01:53:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:17,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:17,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:53:17,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987284288] [2020-07-20 01:53:17,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414474737] [2020-07-20 01:53:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f1a8020 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:53:17,386 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@f1a8020 issued 2 check-sat command(s) [2020-07-20 01:53:17,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:53:17,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 01:53:17,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:53:17,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:53:17,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:53:17,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-07-20 01:53:17,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107395402] [2020-07-20 01:53:17,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:53:17,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:53:17,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:53:17,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:53:17,434 INFO L87 Difference]: Start difference. First operand 120 states and 166 transitions. Second operand 3 states. [2020-07-20 01:53:17,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:53:17,466 INFO L93 Difference]: Finished difference Result 170 states and 230 transitions. [2020-07-20 01:53:17,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:53:17,467 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-07-20 01:53:17,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:53:17,469 INFO L225 Difference]: With dead ends: 170 [2020-07-20 01:53:17,469 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 01:53:17,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:53:17,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 01:53:17,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 120. [2020-07-20 01:53:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 01:53:17,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 165 transitions. [2020-07-20 01:53:17,494 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 165 transitions. Word has length 41 [2020-07-20 01:53:17,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:53:17,495 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 165 transitions. [2020-07-20 01:53:17,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:53:17,495 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 165 transitions. [2020-07-20 01:53:17,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-20 01:53:17,497 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:53:17,497 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:53:17,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 01:53:17,711 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:53:17,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:53:17,712 INFO L82 PathProgramCache]: Analyzing trace with hash -469545370, now seen corresponding path program 1 times [2020-07-20 01:53:17,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:53:17,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121325658] [2020-07-20 01:53:17,713 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79480ab [2020-07-20 01:53:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:18,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:53:18,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121325658] [2020-07-20 01:53:18,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463001260] [2020-07-20 01:53:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@720ce622 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 [2020-07-20 01:53:18,212 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@720ce622 issued 2 check-sat command(s) [2020-07-20 01:53:18,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:53:18,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 01:53:18,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:53:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:53:18,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:53:18,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2020-07-20 01:53:18,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553235739] [2020-07-20 01:53:18,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 01:53:18,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:53:18,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 01:53:18,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:53:18,244 INFO L87 Difference]: Start difference. First operand 120 states and 165 transitions. Second operand 3 states. [2020-07-20 01:53:18,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:53:18,278 INFO L93 Difference]: Finished difference Result 180 states and 246 transitions. [2020-07-20 01:53:18,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 01:53:18,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-07-20 01:53:18,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:53:18,281 INFO L225 Difference]: With dead ends: 180 [2020-07-20 01:53:18,281 INFO L226 Difference]: Without dead ends: 138 [2020-07-20 01:53:18,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:53:18,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-20 01:53:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 121. [2020-07-20 01:53:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-20 01:53:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 166 transitions. [2020-07-20 01:53:18,303 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 166 transitions. Word has length 42 [2020-07-20 01:53:18,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:53:18,303 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 166 transitions. [2020-07-20 01:53:18,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 01:53:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 166 transitions. [2020-07-20 01:53:18,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-07-20 01:53:18,305 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:53:18,306 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:53:18,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:53:18,521 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:53:18,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:53:18,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1206740640, now seen corresponding path program 1 times [2020-07-20 01:53:18,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:53:18,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128046215] [2020-07-20 01:53:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79480ab [2020-07-20 01:53:18,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:18,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:18,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:53:18,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128046215] [2020-07-20 01:53:18,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733081769] [2020-07-20 01:53:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b3bf6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:53:18,928 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4b3bf6 issued 2 check-sat command(s) [2020-07-20 01:53:18,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:53:18,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:53:18,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:53:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:53:18,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-20 01:53:18,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2020-07-20 01:53:18,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693103721] [2020-07-20 01:53:18,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 01:53:18,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:53:18,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 01:53:18,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:53:18,965 INFO L87 Difference]: Start difference. First operand 121 states and 166 transitions. Second operand 4 states. [2020-07-20 01:53:19,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:53:19,021 INFO L93 Difference]: Finished difference Result 161 states and 213 transitions. [2020-07-20 01:53:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 01:53:19,021 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-07-20 01:53:19,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:53:19,023 INFO L225 Difference]: With dead ends: 161 [2020-07-20 01:53:19,024 INFO L226 Difference]: Without dead ends: 128 [2020-07-20 01:53:19,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:53:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-20 01:53:19,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-07-20 01:53:19,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-07-20 01:53:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 174 transitions. [2020-07-20 01:53:19,046 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 174 transitions. Word has length 47 [2020-07-20 01:53:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:53:19,046 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 174 transitions. [2020-07-20 01:53:19,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 01:53:19,047 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 174 transitions. [2020-07-20 01:53:19,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-20 01:53:19,049 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:53:19,049 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:53:19,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:53:19,264 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:53:19,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:53:19,265 INFO L82 PathProgramCache]: Analyzing trace with hash 222099566, now seen corresponding path program 1 times [2020-07-20 01:53:19,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:53:19,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280215551] [2020-07-20 01:53:19,267 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79480ab [2020-07-20 01:53:19,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:19,440 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-07-20 01:53:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-07-20 01:53:19,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280215551] [2020-07-20 01:53:19,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057027118] [2020-07-20 01:53:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4de7e1ce 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 [2020-07-20 01:53:19,694 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4de7e1ce issued 2 check-sat command(s) [2020-07-20 01:53:19,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:53:19,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 01:53:19,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:53:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 01:53:19,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:53:19,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-07-20 01:53:19,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819356333] [2020-07-20 01:53:19,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 01:53:19,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:53:19,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 01:53:19,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:53:19,757 INFO L87 Difference]: Start difference. First operand 128 states and 174 transitions. Second operand 10 states. [2020-07-20 01:53:19,880 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-07-20 01:53:20,455 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-07-20 01:53:20,678 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-07-20 01:53:20,832 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-07-20 01:53:21,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:53:21,843 INFO L93 Difference]: Finished difference Result 293 states and 414 transitions. [2020-07-20 01:53:21,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 01:53:21,844 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-07-20 01:53:21,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:53:21,846 INFO L225 Difference]: With dead ends: 293 [2020-07-20 01:53:21,846 INFO L226 Difference]: Without dead ends: 181 [2020-07-20 01:53:21,849 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-07-20 01:53:21,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-07-20 01:53:21,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 142. [2020-07-20 01:53:21,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-20 01:53:21,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 190 transitions. [2020-07-20 01:53:21,886 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 190 transitions. Word has length 51 [2020-07-20 01:53:21,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:53:21,886 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 190 transitions. [2020-07-20 01:53:21,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 01:53:21,886 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 190 transitions. [2020-07-20 01:53:21,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-07-20 01:53:21,888 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:53:21,889 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:53:22,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:53:22,099 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:53:22,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:53:22,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1250021058, now seen corresponding path program 2 times [2020-07-20 01:53:22,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:53:22,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189830213] [2020-07-20 01:53:22,101 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79480ab [2020-07-20 01:53:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:22,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:22,320 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 01:53:22,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189830213] [2020-07-20 01:53:22,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913015869] [2020-07-20 01:53:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@efa5afb No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:53:22,558 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@efa5afb issued 3 check-sat command(s) [2020-07-20 01:53:22,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:53:22,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-20 01:53:22,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:53:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 01:53:22,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:53:22,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 8 [2020-07-20 01:53:22,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755368983] [2020-07-20 01:53:22,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 01:53:22,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:53:22,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 01:53:22,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-07-20 01:53:22,624 INFO L87 Difference]: Start difference. First operand 142 states and 190 transitions. Second operand 8 states. [2020-07-20 01:53:23,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:53:23,882 INFO L93 Difference]: Finished difference Result 326 states and 458 transitions. [2020-07-20 01:53:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:53:23,883 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-07-20 01:53:23,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:53:23,886 INFO L225 Difference]: With dead ends: 326 [2020-07-20 01:53:23,886 INFO L226 Difference]: Without dead ends: 202 [2020-07-20 01:53:23,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:53:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-20 01:53:23,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 144. [2020-07-20 01:53:23,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-20 01:53:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 192 transitions. [2020-07-20 01:53:23,907 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 192 transitions. Word has length 57 [2020-07-20 01:53:23,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:53:23,907 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 192 transitions. [2020-07-20 01:53:23,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 01:53:23,908 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 192 transitions. [2020-07-20 01:53:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-07-20 01:53:23,909 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:53:23,909 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:53:24,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 01:53:24,122 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:53:24,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:53:24,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1340728960, now seen corresponding path program 3 times [2020-07-20 01:53:24,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:53:24,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011669024] [2020-07-20 01:53:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79480ab [2020-07-20 01:53:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:53:24,376 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 01:53:24,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011669024] [2020-07-20 01:53:24,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430865544] [2020-07-20 01:53:24,377 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1cffbce0 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 [2020-07-20 01:53:24,754 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1cffbce0 issued 3 check-sat command(s) [2020-07-20 01:53:24,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:53:24,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 01:53:24,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:53:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-07-20 01:53:24,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:53:24,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 9 [2020-07-20 01:53:24,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855711226] [2020-07-20 01:53:24,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 01:53:24,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:53:24,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 01:53:24,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:53:24,807 INFO L87 Difference]: Start difference. First operand 144 states and 192 transitions. Second operand 9 states. [2020-07-20 01:53:26,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:53:26,380 INFO L93 Difference]: Finished difference Result 347 states and 491 transitions. [2020-07-20 01:53:26,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 01:53:26,381 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-07-20 01:53:26,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:53:26,383 INFO L225 Difference]: With dead ends: 347 [2020-07-20 01:53:26,383 INFO L226 Difference]: Without dead ends: 223 [2020-07-20 01:53:26,384 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-07-20 01:53:26,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-20 01:53:26,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 146. [2020-07-20 01:53:26,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-20 01:53:26,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 194 transitions. [2020-07-20 01:53:26,409 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 194 transitions. Word has length 59 [2020-07-20 01:53:26,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:53:26,411 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 194 transitions. [2020-07-20 01:53:26,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 01:53:26,411 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 194 transitions. [2020-07-20 01:53:26,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 01:53:26,412 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:53:26,412 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:53:26,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:53:26,628 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:53:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:53:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1683290434, now seen corresponding path program 4 times [2020-07-20 01:53:26,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:53:26,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463869774] [2020-07-20 01:53:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@79480ab [2020-07-20 01:53:26,665 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-07-20 01:53:26,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765463067] [2020-07-20 01:53:26,666 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7250044b 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