/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 DAGSIZE --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/systemc/transmitter.16.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 22:58:34,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 22:58:34,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 22:58:34,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 22:58:34,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 22:58:34,707 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 22:58:34,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 22:58:34,722 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 22:58:34,724 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 22:58:34,725 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 22:58:34,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 22:58:34,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 22:58:34,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 22:58:34,728 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 22:58:34,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 22:58:34,730 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 22:58:34,731 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 22:58:34,732 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 22:58:34,733 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 22:58:34,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 22:58:34,737 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 22:58:34,738 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 22:58:34,739 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 22:58:34,739 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 22:58:34,742 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 22:58:34,742 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 22:58:34,742 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 22:58:34,743 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 22:58:34,744 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 22:58:34,744 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-07-20 22:58:34,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 22:58:34,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 22:58:34,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 22:58:34,754 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 22:58:34,769 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 22:58:34,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 22:58:34,771 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 22:58:34,771 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 22:58:34,771 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 22:58:34,772 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 22:58:34,772 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 22:58:34,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 22:58:34,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 22:58:34,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 22:58:34,773 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 22:58:34,773 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 22:58:34,773 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 22:58:34,773 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 22:58:34,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 22:58:34,774 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 22:58:34,774 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 22:58:34,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 22:58:34,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 22:58:34,775 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 22:58:34,775 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 22:58:34,775 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 22:58:34,775 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 22:58:34,775 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 22:58:34,776 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 22:58:34,776 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 22:58:34,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:34,776 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 22:58:34,776 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 22:58:34,777 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 -> DAGSIZE 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 [2020-07-20 22:58:35,072 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 22:58:35,085 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 22:58:35,089 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 22:58:35,090 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 22:58:35,091 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 22:58:35,092 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/transmitter.16.cil.c [2020-07-20 22:58:35,155 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7212c55a/719e668eae894e73aa5f1c1c9ae831b9/FLAGd5e9b8a97 [2020-07-20 22:58:35,645 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 22:58:35,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/transmitter.16.cil.c [2020-07-20 22:58:35,676 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7212c55a/719e668eae894e73aa5f1c1c9ae831b9/FLAGd5e9b8a97 [2020-07-20 22:58:35,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f7212c55a/719e668eae894e73aa5f1c1c9ae831b9 [2020-07-20 22:58:35,927 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 22:58:35,930 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 22:58:35,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 22:58:35,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 22:58:35,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 22:58:35,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:58:35" (1/1) ... [2020-07-20 22:58:35,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24d2ea6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:58:35, skipping insertion in model container [2020-07-20 22:58:35,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:58:35" (1/1) ... [2020-07-20 22:58:35,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 22:58:36,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 22:58:36,475 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:58:36,484 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 22:58:36,677 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 22:58:36,721 INFO L208 MainTranslator]: Completed translation [2020-07-20 22:58:36,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:58:36 WrapperNode [2020-07-20 22:58:36,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 22:58:36,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 22:58:36,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 22:58:36,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 22:58:36,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:58:36" (1/1) ... [2020-07-20 22:58:36,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:58:36" (1/1) ... [2020-07-20 22:58:36,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:58:36" (1/1) ... [2020-07-20 22:58:36,748 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:58:36" (1/1) ... [2020-07-20 22:58:36,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:58:36" (1/1) ... [2020-07-20 22:58:36,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:58:36" (1/1) ... [2020-07-20 22:58:36,829 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:58:36" (1/1) ... [2020-07-20 22:58:36,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 22:58:36,838 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 22:58:36,838 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 22:58:36,838 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 22:58:36,839 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:58:36" (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 22:58:36,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 22:58:36,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 22:58:36,928 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-07-20 22:58:36,928 INFO L138 BoogieDeclarations]: Found implementation of procedure master [2020-07-20 22:58:36,928 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit1 [2020-07-20 22:58:36,929 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit2 [2020-07-20 22:58:36,929 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit3 [2020-07-20 22:58:36,929 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit4 [2020-07-20 22:58:36,929 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit5 [2020-07-20 22:58:36,929 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit6 [2020-07-20 22:58:36,930 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit7 [2020-07-20 22:58:36,931 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit8 [2020-07-20 22:58:36,931 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit9 [2020-07-20 22:58:36,931 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit10 [2020-07-20 22:58:36,931 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit11 [2020-07-20 22:58:36,932 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit12 [2020-07-20 22:58:36,932 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit13 [2020-07-20 22:58:36,932 INFO L138 BoogieDeclarations]: Found implementation of procedure transmit14 [2020-07-20 22:58:36,932 INFO L138 BoogieDeclarations]: Found implementation of procedure is_master_triggered [2020-07-20 22:58:36,933 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit1_triggered [2020-07-20 22:58:36,933 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit2_triggered [2020-07-20 22:58:36,933 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit3_triggered [2020-07-20 22:58:36,933 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit4_triggered [2020-07-20 22:58:36,933 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit5_triggered [2020-07-20 22:58:36,933 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit6_triggered [2020-07-20 22:58:36,934 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit7_triggered [2020-07-20 22:58:36,934 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit8_triggered [2020-07-20 22:58:36,935 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit9_triggered [2020-07-20 22:58:36,935 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit10_triggered [2020-07-20 22:58:36,935 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit11_triggered [2020-07-20 22:58:36,935 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit12_triggered [2020-07-20 22:58:36,936 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit13_triggered [2020-07-20 22:58:36,936 INFO L138 BoogieDeclarations]: Found implementation of procedure is_transmit14_triggered [2020-07-20 22:58:36,936 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2020-07-20 22:58:36,937 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2020-07-20 22:58:36,937 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2020-07-20 22:58:36,937 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-07-20 22:58:36,938 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2020-07-20 22:58:36,938 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2020-07-20 22:58:36,938 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2020-07-20 22:58:36,938 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2020-07-20 22:58:36,938 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_time_events [2020-07-20 22:58:36,938 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_time_events [2020-07-20 22:58:36,939 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2020-07-20 22:58:36,939 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2020-07-20 22:58:36,939 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-07-20 22:58:36,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 22:58:36,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 22:58:36,942 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 22:58:36,942 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-07-20 22:58:36,942 INFO L130 BoogieDeclarations]: Found specification of procedure is_master_triggered [2020-07-20 22:58:36,943 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit1_triggered [2020-07-20 22:58:36,943 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit2_triggered [2020-07-20 22:58:36,943 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit3_triggered [2020-07-20 22:58:36,943 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit4_triggered [2020-07-20 22:58:36,943 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit5_triggered [2020-07-20 22:58:36,944 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit6_triggered [2020-07-20 22:58:36,944 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit7_triggered [2020-07-20 22:58:36,944 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit8_triggered [2020-07-20 22:58:36,944 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit9_triggered [2020-07-20 22:58:36,944 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit10_triggered [2020-07-20 22:58:36,945 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit11_triggered [2020-07-20 22:58:36,945 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit12_triggered [2020-07-20 22:58:36,945 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit13_triggered [2020-07-20 22:58:36,945 INFO L130 BoogieDeclarations]: Found specification of procedure is_transmit14_triggered [2020-07-20 22:58:36,945 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2020-07-20 22:58:36,945 INFO L130 BoogieDeclarations]: Found specification of procedure master [2020-07-20 22:58:36,945 INFO L130 BoogieDeclarations]: Found specification of procedure transmit1 [2020-07-20 22:58:36,946 INFO L130 BoogieDeclarations]: Found specification of procedure transmit2 [2020-07-20 22:58:36,946 INFO L130 BoogieDeclarations]: Found specification of procedure transmit3 [2020-07-20 22:58:36,946 INFO L130 BoogieDeclarations]: Found specification of procedure transmit4 [2020-07-20 22:58:36,946 INFO L130 BoogieDeclarations]: Found specification of procedure transmit5 [2020-07-20 22:58:36,947 INFO L130 BoogieDeclarations]: Found specification of procedure transmit6 [2020-07-20 22:58:36,947 INFO L130 BoogieDeclarations]: Found specification of procedure transmit7 [2020-07-20 22:58:36,947 INFO L130 BoogieDeclarations]: Found specification of procedure transmit8 [2020-07-20 22:58:36,948 INFO L130 BoogieDeclarations]: Found specification of procedure transmit9 [2020-07-20 22:58:36,948 INFO L130 BoogieDeclarations]: Found specification of procedure transmit10 [2020-07-20 22:58:36,949 INFO L130 BoogieDeclarations]: Found specification of procedure transmit11 [2020-07-20 22:58:36,950 INFO L130 BoogieDeclarations]: Found specification of procedure transmit12 [2020-07-20 22:58:36,950 INFO L130 BoogieDeclarations]: Found specification of procedure transmit13 [2020-07-20 22:58:36,950 INFO L130 BoogieDeclarations]: Found specification of procedure transmit14 [2020-07-20 22:58:36,950 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2020-07-20 22:58:36,950 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2020-07-20 22:58:36,950 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2020-07-20 22:58:36,951 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-07-20 22:58:36,951 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2020-07-20 22:58:36,951 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2020-07-20 22:58:36,952 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2020-07-20 22:58:36,952 INFO L130 BoogieDeclarations]: Found specification of procedure fire_time_events [2020-07-20 22:58:36,952 INFO L130 BoogieDeclarations]: Found specification of procedure reset_time_events [2020-07-20 22:58:36,952 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2020-07-20 22:58:36,953 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2020-07-20 22:58:36,953 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-07-20 22:58:36,953 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 22:58:36,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 22:58:36,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 22:58:38,300 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 22:58:38,303 INFO L295 CfgBuilder]: Removed 18 assume(true) statements. [2020-07-20 22:58:38,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:58:38 BoogieIcfgContainer [2020-07-20 22:58:38,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 22:58:38,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 22:58:38,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 22:58:38,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 22:58:38,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:58:35" (1/3) ... [2020-07-20 22:58:38,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f68cd1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:58:38, skipping insertion in model container [2020-07-20 22:58:38,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:58:36" (2/3) ... [2020-07-20 22:58:38,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f68cd1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:58:38, skipping insertion in model container [2020-07-20 22:58:38,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:58:38" (3/3) ... [2020-07-20 22:58:38,329 INFO L109 eAbstractionObserver]: Analyzing ICFG transmitter.16.cil.c [2020-07-20 22:58:38,340 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 22:58:38,352 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 22:58:38,367 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 22:58:38,398 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 22:58:38,398 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 22:58:38,399 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 22:58:38,399 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 22:58:38,399 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 22:58:38,399 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 22:58:38,400 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 22:58:38,401 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 22:58:38,434 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states. [2020-07-20 22:58:38,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-20 22:58:38,457 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:58:38,458 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:58:38,459 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:58:38,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:58:38,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1383974208, now seen corresponding path program 1 times [2020-07-20 22:58:38,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:58:38,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100338294] [2020-07-20 22:58:38,476 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 [2020-07-20 22:58:38,772 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 22:58:38,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:58:38,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:58:38,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:58:38,969 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 22:58:38,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:58:38,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100338294] [2020-07-20 22:58:38,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:58:38,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:58:38,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579735329] [2020-07-20 22:58:38,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:58:38,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:58:38,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:58:38,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:38,999 INFO L87 Difference]: Start difference. First operand 526 states. Second operand 3 states. [2020-07-20 22:58:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:58:39,114 INFO L93 Difference]: Finished difference Result 1034 states and 1610 transitions. [2020-07-20 22:58:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:58:39,116 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-07-20 22:58:39,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:58:39,140 INFO L225 Difference]: With dead ends: 1034 [2020-07-20 22:58:39,140 INFO L226 Difference]: Without dead ends: 517 [2020-07-20 22:58:39,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:39,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-07-20 22:58:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2020-07-20 22:58:39,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-07-20 22:58:39,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 760 transitions. [2020-07-20 22:58:39,284 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 760 transitions. Word has length 254 [2020-07-20 22:58:39,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:58:39,288 INFO L479 AbstractCegarLoop]: Abstraction has 517 states and 760 transitions. [2020-07-20 22:58:39,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:58:39,289 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 760 transitions. [2020-07-20 22:58:39,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-20 22:58:39,303 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:58:39,305 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:58:39,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:39,521 INFO L427 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:58:39,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:58:39,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1614538174, now seen corresponding path program 1 times [2020-07-20 22:58:39,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:58:39,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762913616] [2020-07-20 22:58:39,524 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 [2020-07-20 22:58:39,703 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 22:58:39,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:58:39,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:58:39,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:58:39,817 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 22:58:39,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:58:39,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762913616] [2020-07-20 22:58:39,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:58:39,819 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:58:39,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077416911] [2020-07-20 22:58:39,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:58:39,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:58:39,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:58:39,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:39,828 INFO L87 Difference]: Start difference. First operand 517 states and 760 transitions. Second operand 3 states. [2020-07-20 22:58:39,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:58:39,915 INFO L93 Difference]: Finished difference Result 1010 states and 1486 transitions. [2020-07-20 22:58:39,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:58:39,915 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-07-20 22:58:39,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:58:39,922 INFO L225 Difference]: With dead ends: 1010 [2020-07-20 22:58:39,922 INFO L226 Difference]: Without dead ends: 517 [2020-07-20 22:58:39,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:39,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-07-20 22:58:39,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 517. [2020-07-20 22:58:39,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 517 states. [2020-07-20 22:58:39,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 759 transitions. [2020-07-20 22:58:39,969 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 759 transitions. Word has length 254 [2020-07-20 22:58:39,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:58:39,971 INFO L479 AbstractCegarLoop]: Abstraction has 517 states and 759 transitions. [2020-07-20 22:58:39,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:58:39,971 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 759 transitions. [2020-07-20 22:58:39,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2020-07-20 22:58:39,981 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:58:39,981 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:58:40,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:40,197 INFO L427 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:58:40,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:58:40,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1491636548, now seen corresponding path program 1 times [2020-07-20 22:58:40,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:58:40,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014618903] [2020-07-20 22:58:40,199 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 [2020-07-20 22:58:40,479 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:58:40,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:58:40,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:58:40,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:58:40,551 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 22:58:40,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:58:40,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014618903] [2020-07-20 22:58:40,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:58:40,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:58:40,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127830835] [2020-07-20 22:58:40,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:58:40,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:58:40,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:58:40,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:40,554 INFO L87 Difference]: Start difference. First operand 517 states and 759 transitions. Second operand 3 states. [2020-07-20 22:58:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:58:40,632 INFO L93 Difference]: Finished difference Result 1479 states and 2209 transitions. [2020-07-20 22:58:40,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:58:40,632 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 254 [2020-07-20 22:58:40,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:58:40,642 INFO L225 Difference]: With dead ends: 1479 [2020-07-20 22:58:40,643 INFO L226 Difference]: Without dead ends: 996 [2020-07-20 22:58:40,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:40,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2020-07-20 22:58:40,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 990. [2020-07-20 22:58:40,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 990 states. [2020-07-20 22:58:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1488 transitions. [2020-07-20 22:58:40,701 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1488 transitions. Word has length 254 [2020-07-20 22:58:40,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:58:40,702 INFO L479 AbstractCegarLoop]: Abstraction has 990 states and 1488 transitions. [2020-07-20 22:58:40,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:58:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1488 transitions. [2020-07-20 22:58:40,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 22:58:40,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:58:40,709 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:58:40,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:40,924 INFO L427 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:58:40,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:58:40,925 INFO L82 PathProgramCache]: Analyzing trace with hash 738332232, now seen corresponding path program 1 times [2020-07-20 22:58:40,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:58:40,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694787215] [2020-07-20 22:58:40,930 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 [2020-07-20 22:58:41,273 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:58:41,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:58:41,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 1796 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:58:41,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:58:41,377 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 22:58:41,378 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:58:41,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694787215] [2020-07-20 22:58:41,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:58:41,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:58:41,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380389302] [2020-07-20 22:58:41,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:58:41,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:58:41,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:58:41,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:58:41,381 INFO L87 Difference]: Start difference. First operand 990 states and 1488 transitions. Second operand 6 states. [2020-07-20 22:58:41,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:58:41,475 INFO L93 Difference]: Finished difference Result 1997 states and 3101 transitions. [2020-07-20 22:58:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:58:41,475 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 255 [2020-07-20 22:58:41,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:58:41,484 INFO L225 Difference]: With dead ends: 1997 [2020-07-20 22:58:41,484 INFO L226 Difference]: Without dead ends: 1058 [2020-07-20 22:58:41,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:58:41,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1058 states. [2020-07-20 22:58:41,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1058 to 1000. [2020-07-20 22:58:41,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1000 states. [2020-07-20 22:58:41,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1498 transitions. [2020-07-20 22:58:41,544 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1498 transitions. Word has length 255 [2020-07-20 22:58:41,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:58:41,545 INFO L479 AbstractCegarLoop]: Abstraction has 1000 states and 1498 transitions. [2020-07-20 22:58:41,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:58:41,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1498 transitions. [2020-07-20 22:58:41,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 22:58:41,550 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:58:41,550 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:58:41,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:41,764 INFO L427 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:58:41,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:58:41,765 INFO L82 PathProgramCache]: Analyzing trace with hash -660621370, now seen corresponding path program 1 times [2020-07-20 22:58:41,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:58:41,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521182667] [2020-07-20 22:58:41,766 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 [2020-07-20 22:58:42,136 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:58:42,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:58:42,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 1797 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:58:42,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:58:42,219 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 22:58:42,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:58:42,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521182667] [2020-07-20 22:58:42,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:58:42,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:58:42,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570249098] [2020-07-20 22:58:42,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:58:42,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:58:42,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:58:42,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:58:42,223 INFO L87 Difference]: Start difference. First operand 1000 states and 1498 transitions. Second operand 6 states. [2020-07-20 22:58:42,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:58:42,320 INFO L93 Difference]: Finished difference Result 2005 states and 3101 transitions. [2020-07-20 22:58:42,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:58:42,320 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 255 [2020-07-20 22:58:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:58:42,328 INFO L225 Difference]: With dead ends: 2005 [2020-07-20 22:58:42,329 INFO L226 Difference]: Without dead ends: 1056 [2020-07-20 22:58:42,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:58:42,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2020-07-20 22:58:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1010. [2020-07-20 22:58:42,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1010 states. [2020-07-20 22:58:42,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1508 transitions. [2020-07-20 22:58:42,396 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1508 transitions. Word has length 255 [2020-07-20 22:58:42,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:58:42,398 INFO L479 AbstractCegarLoop]: Abstraction has 1010 states and 1508 transitions. [2020-07-20 22:58:42,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:58:42,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1508 transitions. [2020-07-20 22:58:42,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 22:58:42,403 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:58:42,404 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:58:42,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:42,618 INFO L427 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:58:42,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:58:42,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1061381316, now seen corresponding path program 1 times [2020-07-20 22:58:42,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:58:42,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669618515] [2020-07-20 22:58:42,621 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 [2020-07-20 22:58:42,904 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:58:42,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:58:42,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 1798 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:58:42,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:58:43,039 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 22:58:43,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:58:43,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669618515] [2020-07-20 22:58:43,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:58:43,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:58:43,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418881029] [2020-07-20 22:58:43,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:58:43,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:58:43,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:58:43,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:58:43,043 INFO L87 Difference]: Start difference. First operand 1010 states and 1508 transitions. Second operand 6 states. [2020-07-20 22:58:43,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:58:43,120 INFO L93 Difference]: Finished difference Result 2013 states and 3101 transitions. [2020-07-20 22:58:43,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:58:43,121 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 255 [2020-07-20 22:58:43,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:58:43,138 INFO L225 Difference]: With dead ends: 2013 [2020-07-20 22:58:43,139 INFO L226 Difference]: Without dead ends: 1054 [2020-07-20 22:58:43,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:58:43,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2020-07-20 22:58:43,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 1020. [2020-07-20 22:58:43,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1020 states. [2020-07-20 22:58:43,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1518 transitions. [2020-07-20 22:58:43,199 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1518 transitions. Word has length 255 [2020-07-20 22:58:43,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:58:43,199 INFO L479 AbstractCegarLoop]: Abstraction has 1020 states and 1518 transitions. [2020-07-20 22:58:43,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:58:43,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1518 transitions. [2020-07-20 22:58:43,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 22:58:43,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:58:43,210 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:58:43,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:43,425 INFO L427 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:58:43,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:58:43,426 INFO L82 PathProgramCache]: Analyzing trace with hash 30340418, now seen corresponding path program 1 times [2020-07-20 22:58:43,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:58:43,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104775167] [2020-07-20 22:58:43,427 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:43,713 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:58:43,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:58:43,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 1799 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-20 22:58:43,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:58:43,817 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 22:58:43,817 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:58:43,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104775167] [2020-07-20 22:58:43,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:58:43,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:58:43,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554140965] [2020-07-20 22:58:43,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:58:43,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:58:43,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:58:43,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:58:43,820 INFO L87 Difference]: Start difference. First operand 1020 states and 1518 transitions. Second operand 6 states. [2020-07-20 22:58:43,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:58:43,902 INFO L93 Difference]: Finished difference Result 2009 states and 3081 transitions. [2020-07-20 22:58:43,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:58:43,903 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 255 [2020-07-20 22:58:43,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:58:43,910 INFO L225 Difference]: With dead ends: 2009 [2020-07-20 22:58:43,910 INFO L226 Difference]: Without dead ends: 1040 [2020-07-20 22:58:43,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:58:43,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2020-07-20 22:58:43,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 1030. [2020-07-20 22:58:43,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1030 states. [2020-07-20 22:58:43,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 1528 transitions. [2020-07-20 22:58:43,960 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 1528 transitions. Word has length 255 [2020-07-20 22:58:43,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:58:43,960 INFO L479 AbstractCegarLoop]: Abstraction has 1030 states and 1528 transitions. [2020-07-20 22:58:43,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:58:43,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 1528 transitions. [2020-07-20 22:58:43,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 22:58:43,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:58:43,965 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:58:44,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:44,179 INFO L427 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:58:44,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:58:44,179 INFO L82 PathProgramCache]: Analyzing trace with hash 447737024, now seen corresponding path program 1 times [2020-07-20 22:58:44,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:58:44,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965632152] [2020-07-20 22:58:44,180 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:44,449 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:58:44,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:58:44,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 1800 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:58:44,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:58:44,528 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 22:58:44,529 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:58:44,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965632152] [2020-07-20 22:58:44,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:58:44,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:58:44,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51713531] [2020-07-20 22:58:44,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:58:44,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:58:44,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:58:44,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:44,531 INFO L87 Difference]: Start difference. First operand 1030 states and 1528 transitions. Second operand 3 states. [2020-07-20 22:58:44,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:58:44,639 INFO L93 Difference]: Finished difference Result 2964 states and 4486 transitions. [2020-07-20 22:58:44,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:58:44,639 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 22:58:44,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:58:44,653 INFO L225 Difference]: With dead ends: 2964 [2020-07-20 22:58:44,653 INFO L226 Difference]: Without dead ends: 1985 [2020-07-20 22:58:44,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:44,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2020-07-20 22:58:44,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1978. [2020-07-20 22:58:44,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1978 states. [2020-07-20 22:58:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 2938 transitions. [2020-07-20 22:58:44,763 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 2938 transitions. Word has length 255 [2020-07-20 22:58:44,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:58:44,764 INFO L479 AbstractCegarLoop]: Abstraction has 1978 states and 2938 transitions. [2020-07-20 22:58:44,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:58:44,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 2938 transitions. [2020-07-20 22:58:44,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 22:58:44,768 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:58:44,769 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:58:44,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:44,982 INFO L427 AbstractCegarLoop]: === Iteration 9 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:58:44,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:58:44,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1762377469, now seen corresponding path program 1 times [2020-07-20 22:58:44,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:58:44,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955964294] [2020-07-20 22:58:44,983 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:45,338 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:58:45,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:58:45,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 1796 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:58:45,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:58:45,436 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 22:58:45,436 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:58:45,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955964294] [2020-07-20 22:58:45,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:58:45,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:58:45,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302814980] [2020-07-20 22:58:45,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:58:45,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:58:45,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:58:45,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:45,439 INFO L87 Difference]: Start difference. First operand 1978 states and 2938 transitions. Second operand 3 states. [2020-07-20 22:58:45,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:58:45,570 INFO L93 Difference]: Finished difference Result 5822 states and 8840 transitions. [2020-07-20 22:58:45,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:58:45,571 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 22:58:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:58:45,595 INFO L225 Difference]: With dead ends: 5822 [2020-07-20 22:58:45,595 INFO L226 Difference]: Without dead ends: 3895 [2020-07-20 22:58:45,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:45,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3895 states. [2020-07-20 22:58:45,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3895 to 3886. [2020-07-20 22:58:45,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3886 states. [2020-07-20 22:58:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3886 states to 3886 states and 5775 transitions. [2020-07-20 22:58:45,773 INFO L78 Accepts]: Start accepts. Automaton has 3886 states and 5775 transitions. Word has length 255 [2020-07-20 22:58:45,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:58:45,774 INFO L479 AbstractCegarLoop]: Abstraction has 3886 states and 5775 transitions. [2020-07-20 22:58:45,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:58:45,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3886 states and 5775 transitions. [2020-07-20 22:58:45,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 22:58:45,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:58:45,778 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:58:45,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:45,993 INFO L427 AbstractCegarLoop]: === Iteration 10 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:58:45,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:58:45,994 INFO L82 PathProgramCache]: Analyzing trace with hash -154122908, now seen corresponding path program 1 times [2020-07-20 22:58:45,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:58:45,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703906822] [2020-07-20 22:58:45,995 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:46,144 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s) [2020-07-20 22:58:46,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:58:46,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 22:58:46,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:58:46,250 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 22:58:46,251 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:58:46,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703906822] [2020-07-20 22:58:46,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:58:46,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:58:46,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137881096] [2020-07-20 22:58:46,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:58:46,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:58:46,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:58:46,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:46,253 INFO L87 Difference]: Start difference. First operand 3886 states and 5775 transitions. Second operand 3 states. [2020-07-20 22:58:46,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:58:46,365 INFO L93 Difference]: Finished difference Result 7103 states and 10426 transitions. [2020-07-20 22:58:46,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:58:46,366 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 22:58:46,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:58:46,386 INFO L225 Difference]: With dead ends: 7103 [2020-07-20 22:58:46,387 INFO L226 Difference]: Without dead ends: 3250 [2020-07-20 22:58:46,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:46,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2020-07-20 22:58:46,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 3250. [2020-07-20 22:58:46,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3250 states. [2020-07-20 22:58:46,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3250 states to 3250 states and 4699 transitions. [2020-07-20 22:58:46,537 INFO L78 Accepts]: Start accepts. Automaton has 3250 states and 4699 transitions. Word has length 255 [2020-07-20 22:58:46,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:58:46,537 INFO L479 AbstractCegarLoop]: Abstraction has 3250 states and 4699 transitions. [2020-07-20 22:58:46,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:58:46,538 INFO L276 IsEmpty]: Start isEmpty. Operand 3250 states and 4699 transitions. [2020-07-20 22:58:46,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 22:58:46,539 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:58:46,540 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:58:46,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:46,754 INFO L427 AbstractCegarLoop]: === Iteration 11 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:58:46,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:58:46,754 INFO L82 PathProgramCache]: Analyzing trace with hash -506779422, now seen corresponding path program 1 times [2020-07-20 22:58:46,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:58:46,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363613981] [2020-07-20 22:58:46,755 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:46,926 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-20 22:58:46,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:58:46,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 22:58:46,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:58:46,988 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 22:58:46,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:58:46,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363613981] [2020-07-20 22:58:46,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:58:46,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 22:58:46,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985773344] [2020-07-20 22:58:46,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 22:58:46,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:58:46,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 22:58:46,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 22:58:46,991 INFO L87 Difference]: Start difference. First operand 3250 states and 4699 transitions. Second operand 6 states. [2020-07-20 22:58:47,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:58:47,139 INFO L93 Difference]: Finished difference Result 6589 states and 9727 transitions. [2020-07-20 22:58:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 22:58:47,140 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 255 [2020-07-20 22:58:47,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:58:47,165 INFO L225 Difference]: With dead ends: 6589 [2020-07-20 22:58:47,165 INFO L226 Difference]: Without dead ends: 3372 [2020-07-20 22:58:47,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 22:58:47,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2020-07-20 22:58:47,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 3372. [2020-07-20 22:58:47,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3372 states. [2020-07-20 22:58:47,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 4880 transitions. [2020-07-20 22:58:47,392 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 4880 transitions. Word has length 255 [2020-07-20 22:58:47,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:58:47,393 INFO L479 AbstractCegarLoop]: Abstraction has 3372 states and 4880 transitions. [2020-07-20 22:58:47,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 22:58:47,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 4880 transitions. [2020-07-20 22:58:47,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 22:58:47,395 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:58:47,395 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:58:47,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:47,611 INFO L427 AbstractCegarLoop]: === Iteration 12 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:58:47,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:58:47,611 INFO L82 PathProgramCache]: Analyzing trace with hash -34439776, now seen corresponding path program 1 times [2020-07-20 22:58:47,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:58:47,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611625973] [2020-07-20 22:58:47,612 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 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:47,906 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:58:47,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:58:47,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 1792 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:58:47,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:58:47,993 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 22:58:47,994 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:58:47,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611625973] [2020-07-20 22:58:47,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:58:47,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:58:47,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717791000] [2020-07-20 22:58:47,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:58:47,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:58:47,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:58:47,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:47,996 INFO L87 Difference]: Start difference. First operand 3372 states and 4880 transitions. Second operand 3 states. [2020-07-20 22:58:48,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:58:48,173 INFO L93 Difference]: Finished difference Result 9967 states and 14727 transitions. [2020-07-20 22:58:48,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:58:48,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 22:58:48,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:58:48,213 INFO L225 Difference]: With dead ends: 9967 [2020-07-20 22:58:48,213 INFO L226 Difference]: Without dead ends: 6628 [2020-07-20 22:58:48,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:48,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6628 states. [2020-07-20 22:58:48,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6628 to 6613. [2020-07-20 22:58:48,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6613 states. [2020-07-20 22:58:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6613 states to 6613 states and 9607 transitions. [2020-07-20 22:58:48,598 INFO L78 Accepts]: Start accepts. Automaton has 6613 states and 9607 transitions. Word has length 255 [2020-07-20 22:58:48,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:58:48,598 INFO L479 AbstractCegarLoop]: Abstraction has 6613 states and 9607 transitions. [2020-07-20 22:58:48,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:58:48,599 INFO L276 IsEmpty]: Start isEmpty. Operand 6613 states and 9607 transitions. [2020-07-20 22:58:48,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 22:58:48,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:58:48,601 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:58:48,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:48,814 INFO L427 AbstractCegarLoop]: === Iteration 13 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:58:48,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:58:48,814 INFO L82 PathProgramCache]: Analyzing trace with hash -596284253, now seen corresponding path program 1 times [2020-07-20 22:58:48,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:58:48,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987028813] [2020-07-20 22:58:48,815 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:49,094 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:58:49,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:58:49,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 1788 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:58:49,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:58:49,173 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 22:58:49,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:58:49,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987028813] [2020-07-20 22:58:49,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:58:49,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:58:49,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893261595] [2020-07-20 22:58:49,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:58:49,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:58:49,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:58:49,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:49,176 INFO L87 Difference]: Start difference. First operand 6613 states and 9607 transitions. Second operand 3 states. [2020-07-20 22:58:49,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:58:49,500 INFO L93 Difference]: Finished difference Result 19608 states and 29118 transitions. [2020-07-20 22:58:49,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:58:49,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 22:58:49,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:58:49,576 INFO L225 Difference]: With dead ends: 19608 [2020-07-20 22:58:49,576 INFO L226 Difference]: Without dead ends: 13028 [2020-07-20 22:58:49,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:49,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13028 states. [2020-07-20 22:58:50,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13028 to 13001. [2020-07-20 22:58:50,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13001 states. [2020-07-20 22:58:50,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13001 states to 13001 states and 18981 transitions. [2020-07-20 22:58:50,365 INFO L78 Accepts]: Start accepts. Automaton has 13001 states and 18981 transitions. Word has length 255 [2020-07-20 22:58:50,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:58:50,365 INFO L479 AbstractCegarLoop]: Abstraction has 13001 states and 18981 transitions. [2020-07-20 22:58:50,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:58:50,366 INFO L276 IsEmpty]: Start isEmpty. Operand 13001 states and 18981 transitions. [2020-07-20 22:58:50,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 22:58:50,370 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:58:50,370 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:58:50,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:50,584 INFO L427 AbstractCegarLoop]: === Iteration 14 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:58:50,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:58:50,584 INFO L82 PathProgramCache]: Analyzing trace with hash 722216550, now seen corresponding path program 1 times [2020-07-20 22:58:50,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:58:50,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788914241] [2020-07-20 22:58:50,585 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 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:50,864 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:58:50,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:58:50,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 1784 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:58:50,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:58:50,948 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 22:58:50,949 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:58:50,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788914241] [2020-07-20 22:58:50,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:58:50,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:58:50,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218673093] [2020-07-20 22:58:50,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:58:50,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:58:50,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:58:50,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:50,951 INFO L87 Difference]: Start difference. First operand 13001 states and 18981 transitions. Second operand 3 states. [2020-07-20 22:58:52,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:58:52,438 INFO L93 Difference]: Finished difference Result 38680 states and 57896 transitions. [2020-07-20 22:58:52,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:58:52,438 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 22:58:52,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:58:52,578 INFO L225 Difference]: With dead ends: 38680 [2020-07-20 22:58:52,579 INFO L226 Difference]: Without dead ends: 25712 [2020-07-20 22:58:52,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:52,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25712 states. [2020-07-20 22:58:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25712 to 25661. [2020-07-20 22:58:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25661 states. [2020-07-20 22:58:53,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25661 states to 25661 states and 37723 transitions. [2020-07-20 22:58:53,496 INFO L78 Accepts]: Start accepts. Automaton has 25661 states and 37723 transitions. Word has length 255 [2020-07-20 22:58:53,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:58:53,497 INFO L479 AbstractCegarLoop]: Abstraction has 25661 states and 37723 transitions. [2020-07-20 22:58:53,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:58:53,497 INFO L276 IsEmpty]: Start isEmpty. Operand 25661 states and 37723 transitions. [2020-07-20 22:58:53,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 22:58:53,499 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:58:53,500 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:58:53,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:53,881 INFO L427 AbstractCegarLoop]: === Iteration 15 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:58:53,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:58:53,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1442448809, now seen corresponding path program 1 times [2020-07-20 22:58:53,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:58:53,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073913734] [2020-07-20 22:58:53,883 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 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:54,180 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:58:54,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:58:54,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 1780 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:58:54,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:58:54,244 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 22:58:54,244 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:58:54,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073913734] [2020-07-20 22:58:54,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:58:54,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:58:54,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595620149] [2020-07-20 22:58:54,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:58:54,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:58:54,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:58:54,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:54,246 INFO L87 Difference]: Start difference. First operand 25661 states and 37723 transitions. Second operand 3 states. [2020-07-20 22:58:55,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:58:55,401 INFO L93 Difference]: Finished difference Result 76612 states and 115502 transitions. [2020-07-20 22:58:55,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:58:55,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 22:58:55,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:58:55,632 INFO L225 Difference]: With dead ends: 76612 [2020-07-20 22:58:55,632 INFO L226 Difference]: Without dead ends: 50984 [2020-07-20 22:58:55,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:55,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50984 states. [2020-07-20 22:58:58,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50984 to 50885. [2020-07-20 22:58:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50885 states. [2020-07-20 22:58:58,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50885 states to 50885 states and 75353 transitions. [2020-07-20 22:58:58,944 INFO L78 Accepts]: Start accepts. Automaton has 50885 states and 75353 transitions. Word has length 255 [2020-07-20 22:58:58,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:58:58,945 INFO L479 AbstractCegarLoop]: Abstraction has 50885 states and 75353 transitions. [2020-07-20 22:58:58,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:58:58,946 INFO L276 IsEmpty]: Start isEmpty. Operand 50885 states and 75353 transitions. [2020-07-20 22:58:58,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 22:58:58,947 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:58:58,947 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:58:59,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:59,148 INFO L427 AbstractCegarLoop]: === Iteration 16 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:58:59,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:58:59,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1798045256, now seen corresponding path program 1 times [2020-07-20 22:58:59,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:58:59,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432996008] [2020-07-20 22:58:59,150 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 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:58:59,424 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:58:59,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:58:59,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 1777 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:58:59,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:58:59,499 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 22:58:59,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:58:59,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432996008] [2020-07-20 22:58:59,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:58:59,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:58:59,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087342445] [2020-07-20 22:58:59,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:58:59,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:58:59,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:58:59,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:58:59,501 INFO L87 Difference]: Start difference. First operand 50885 states and 75353 transitions. Second operand 3 states. [2020-07-20 22:59:01,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:59:01,853 INFO L93 Difference]: Finished difference Result 151980 states and 231828 transitions. [2020-07-20 22:59:01,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:59:01,853 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 22:59:01,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:59:02,440 INFO L225 Difference]: With dead ends: 151980 [2020-07-20 22:59:02,440 INFO L226 Difference]: Without dead ends: 101128 [2020-07-20 22:59:02,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:02,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101128 states. [2020-07-20 22:59:07,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101128 to 100933. [2020-07-20 22:59:07,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100933 states. [2020-07-20 22:59:08,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100933 states to 100933 states and 151139 transitions. [2020-07-20 22:59:08,070 INFO L78 Accepts]: Start accepts. Automaton has 100933 states and 151139 transitions. Word has length 255 [2020-07-20 22:59:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:59:08,071 INFO L479 AbstractCegarLoop]: Abstraction has 100933 states and 151139 transitions. [2020-07-20 22:59:08,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:59:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 100933 states and 151139 transitions. [2020-07-20 22:59:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 22:59:08,073 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:59:08,073 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:59:08,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:08,274 INFO L427 AbstractCegarLoop]: === Iteration 17 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:59:08,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:59:08,275 INFO L82 PathProgramCache]: Analyzing trace with hash 520892583, now seen corresponding path program 1 times [2020-07-20 22:59:08,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:59:08,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918335163] [2020-07-20 22:59:08,276 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:08,554 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:59:08,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:59:08,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 1774 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:59:08,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:59:08,641 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 22:59:08,642 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:59:08,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918335163] [2020-07-20 22:59:08,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:59:08,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:59:08,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917183709] [2020-07-20 22:59:08,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:59:08,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:59:08,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:59:08,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:08,644 INFO L87 Difference]: Start difference. First operand 100933 states and 151139 transitions. Second operand 3 states. [2020-07-20 22:59:15,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:59:15,723 INFO L93 Difference]: Finished difference Result 301516 states and 468198 transitions. [2020-07-20 22:59:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:59:15,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 22:59:15,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:59:17,031 INFO L225 Difference]: With dead ends: 301516 [2020-07-20 22:59:17,032 INFO L226 Difference]: Without dead ends: 200616 [2020-07-20 22:59:17,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:17,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200616 states. [2020-07-20 22:59:25,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200616 to 200229. [2020-07-20 22:59:25,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200229 states. [2020-07-20 22:59:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200229 states to 200229 states and 304897 transitions. [2020-07-20 22:59:26,882 INFO L78 Accepts]: Start accepts. Automaton has 200229 states and 304897 transitions. Word has length 255 [2020-07-20 22:59:26,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 22:59:26,883 INFO L479 AbstractCegarLoop]: Abstraction has 200229 states and 304897 transitions. [2020-07-20 22:59:26,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 22:59:26,884 INFO L276 IsEmpty]: Start isEmpty. Operand 200229 states and 304897 transitions. [2020-07-20 22:59:26,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 22:59:26,885 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 22:59:26,886 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 22:59:27,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:27,099 INFO L427 AbstractCegarLoop]: === Iteration 18 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 22:59:27,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 22:59:27,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1821728186, now seen corresponding path program 1 times [2020-07-20 22:59:27,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 22:59:27,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [805760148] [2020-07-20 22:59:27,100 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 22:59:27,389 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 22:59:27,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 22:59:27,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1771 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 22:59:27,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 22:59:27,488 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 22:59:27,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 22:59:27,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [805760148] [2020-07-20 22:59:27,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 22:59:27,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-20 22:59:27,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149692684] [2020-07-20 22:59:27,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-20 22:59:27,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 22:59:27,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-20 22:59:27,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:27,490 INFO L87 Difference]: Start difference. First operand 200229 states and 304897 transitions. Second operand 3 states. [2020-07-20 22:59:40,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 22:59:40,689 INFO L93 Difference]: Finished difference Result 599340 states and 956732 transitions. [2020-07-20 22:59:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-20 22:59:40,689 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 255 [2020-07-20 22:59:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 22:59:42,322 INFO L225 Difference]: With dead ends: 599340 [2020-07-20 22:59:42,322 INFO L226 Difference]: Without dead ends: 399144 [2020-07-20 22:59:50,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-20 22:59:51,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399144 states. [2020-07-20 23:00:06,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399144 to 398373. [2020-07-20 23:00:06,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398373 states. [2020-07-20 23:00:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398373 states to 398373 states and 621979 transitions. [2020-07-20 23:00:10,193 INFO L78 Accepts]: Start accepts. Automaton has 398373 states and 621979 transitions. Word has length 255 [2020-07-20 23:00:10,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:00:10,194 INFO L479 AbstractCegarLoop]: Abstraction has 398373 states and 621979 transitions. [2020-07-20 23:00:10,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-20 23:00:10,194 INFO L276 IsEmpty]: Start isEmpty. Operand 398373 states and 621979 transitions. [2020-07-20 23:00:10,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 23:00:10,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:00:10,196 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:00:10,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:10,402 INFO L427 AbstractCegarLoop]: === Iteration 19 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:00:10,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:00:10,403 INFO L82 PathProgramCache]: Analyzing trace with hash 566754917, now seen corresponding path program 1 times [2020-07-20 23:00:10,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:00:10,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237109359] [2020-07-20 23:00:10,404 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 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:00:10,693 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:00:10,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:00:10,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 1768 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 23:00:10,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:00:10,782 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 23:00:10,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:00:10,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237109359] [2020-07-20 23:00:10,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:00:10,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 23:00:10,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716592757] [2020-07-20 23:00:10,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 23:00:10,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:00:10,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 23:00:10,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:00:10,787 INFO L87 Difference]: Start difference. First operand 398373 states and 621979 transitions. Second operand 5 states. [2020-07-20 23:00:38,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:00:38,838 INFO L93 Difference]: Finished difference Result 796714 states and 1246218 transitions. [2020-07-20 23:00:38,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 23:00:38,839 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-20 23:00:38,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:00:40,259 INFO L225 Difference]: With dead ends: 796714 [2020-07-20 23:00:40,259 INFO L226 Difference]: Without dead ends: 398373 [2020-07-20 23:00:42,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 23:00:42,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398373 states. [2020-07-20 23:01:07,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398373 to 398373. [2020-07-20 23:01:07,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 398373 states. [2020-07-20 23:01:11,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398373 states to 398373 states and 619675 transitions. [2020-07-20 23:01:11,357 INFO L78 Accepts]: Start accepts. Automaton has 398373 states and 619675 transitions. Word has length 255 [2020-07-20 23:01:11,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:01:11,358 INFO L479 AbstractCegarLoop]: Abstraction has 398373 states and 619675 transitions. [2020-07-20 23:01:11,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 23:01:11,358 INFO L276 IsEmpty]: Start isEmpty. Operand 398373 states and 619675 transitions. [2020-07-20 23:01:11,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 23:01:11,360 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:01:11,360 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:01:11,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:01:11,572 INFO L427 AbstractCegarLoop]: === Iteration 20 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:01:11,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:01:11,573 INFO L82 PathProgramCache]: Analyzing trace with hash -675187803, now seen corresponding path program 1 times [2020-07-20 23:01:11,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:01:11,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545183427] [2020-07-20 23:01:11,574 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 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:01:11,844 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:01:11,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:01:11,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 1762 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 23:01:11,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:01:11,924 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 23:01:11,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:01:11,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545183427] [2020-07-20 23:01:11,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:01:11,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 23:01:11,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957116208] [2020-07-20 23:01:11,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 23:01:11,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:01:11,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 23:01:11,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:01:11,926 INFO L87 Difference]: Start difference. First operand 398373 states and 619675 transitions. Second operand 5 states. [2020-07-20 23:01:58,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:01:58,041 INFO L93 Difference]: Finished difference Result 894187 states and 1533940 transitions. [2020-07-20 23:01:58,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 23:01:58,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-20 23:01:58,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:02:01,846 INFO L225 Difference]: With dead ends: 894187 [2020-07-20 23:02:01,847 INFO L226 Difference]: Without dead ends: 495846 [2020-07-20 23:02:15,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 23:02:17,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495846 states. [2020-07-20 23:02:44,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495846 to 469605. [2020-07-20 23:02:44,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469605 states. [2020-07-20 23:02:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469605 states to 469605 states and 705371 transitions. [2020-07-20 23:02:49,519 INFO L78 Accepts]: Start accepts. Automaton has 469605 states and 705371 transitions. Word has length 255 [2020-07-20 23:02:49,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:02:49,519 INFO L479 AbstractCegarLoop]: Abstraction has 469605 states and 705371 transitions. [2020-07-20 23:02:49,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 23:02:49,520 INFO L276 IsEmpty]: Start isEmpty. Operand 469605 states and 705371 transitions. [2020-07-20 23:02:49,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 23:02:49,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:02:49,522 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:02:49,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:02:49,736 INFO L427 AbstractCegarLoop]: === Iteration 21 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:02:49,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:02:49,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1765025381, now seen corresponding path program 1 times [2020-07-20 23:02:49,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:02:49,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840251316] [2020-07-20 23:02:49,738 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 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:02:50,020 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:02:50,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:02:50,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 1756 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 23:02:50,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:02:50,096 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 23:02:50,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:02:50,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840251316] [2020-07-20 23:02:50,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:02:50,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 23:02:50,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701889509] [2020-07-20 23:02:50,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 23:02:50,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:02:50,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 23:02:50,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:02:50,099 INFO L87 Difference]: Start difference. First operand 469605 states and 705371 transitions. Second operand 5 states. [2020-07-20 23:03:19,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:03:19,153 INFO L93 Difference]: Finished difference Result 939178 states and 1413002 transitions. [2020-07-20 23:03:19,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 23:03:19,154 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-20 23:03:19,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:03:22,043 INFO L225 Difference]: With dead ends: 939178 [2020-07-20 23:03:22,043 INFO L226 Difference]: Without dead ends: 469605 [2020-07-20 23:03:24,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 23:03:24,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469605 states. [2020-07-20 23:04:11,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469605 to 469605. [2020-07-20 23:04:11,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469605 states. [2020-07-20 23:04:15,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469605 states to 469605 states and 703067 transitions. [2020-07-20 23:04:15,930 INFO L78 Accepts]: Start accepts. Automaton has 469605 states and 703067 transitions. Word has length 255 [2020-07-20 23:04:15,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:04:15,931 INFO L479 AbstractCegarLoop]: Abstraction has 469605 states and 703067 transitions. [2020-07-20 23:04:15,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 23:04:15,931 INFO L276 IsEmpty]: Start isEmpty. Operand 469605 states and 703067 transitions. [2020-07-20 23:04:15,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 23:04:15,932 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:04:15,932 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:04:16,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:16,133 INFO L427 AbstractCegarLoop]: === Iteration 22 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:04:16,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:04:16,134 INFO L82 PathProgramCache]: Analyzing trace with hash -578163803, now seen corresponding path program 1 times [2020-07-20 23:04:16,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:04:16,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485040206] [2020-07-20 23:04:16,135 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:04:16,417 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:04:16,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:04:16,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 1750 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 23:04:16,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:04:16,488 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 23:04:16,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:04:16,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485040206] [2020-07-20 23:04:16,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:04:16,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 23:04:16,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949124033] [2020-07-20 23:04:16,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 23:04:16,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:04:16,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 23:04:16,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:04:16,489 INFO L87 Difference]: Start difference. First operand 469605 states and 703067 transitions. Second operand 5 states. [2020-07-20 23:04:45,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:04:45,809 INFO L93 Difference]: Finished difference Result 939178 states and 1408394 transitions. [2020-07-20 23:04:45,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 23:04:45,811 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-20 23:04:45,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:04:49,197 INFO L225 Difference]: With dead ends: 939178 [2020-07-20 23:04:49,198 INFO L226 Difference]: Without dead ends: 469605 [2020-07-20 23:04:52,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 23:04:52,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469605 states. [2020-07-20 23:05:26,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469605 to 469605. [2020-07-20 23:05:26,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469605 states. [2020-07-20 23:05:30,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469605 states to 469605 states and 700763 transitions. [2020-07-20 23:05:30,554 INFO L78 Accepts]: Start accepts. Automaton has 469605 states and 700763 transitions. Word has length 255 [2020-07-20 23:05:30,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:05:30,555 INFO L479 AbstractCegarLoop]: Abstraction has 469605 states and 700763 transitions. [2020-07-20 23:05:30,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 23:05:30,555 INFO L276 IsEmpty]: Start isEmpty. Operand 469605 states and 700763 transitions. [2020-07-20 23:05:30,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 23:05:30,556 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:05:30,556 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:05:30,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:30,757 INFO L427 AbstractCegarLoop]: === Iteration 23 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:05:30,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:05:30,758 INFO L82 PathProgramCache]: Analyzing trace with hash -792297883, now seen corresponding path program 1 times [2020-07-20 23:05:30,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:05:30,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597178863] [2020-07-20 23:05:30,759 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:05:31,045 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:05:31,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:05:31,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 1744 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 23:05:31,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:05:31,117 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 23:05:31,118 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:05:31,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597178863] [2020-07-20 23:05:31,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:05:31,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 23:05:31,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875852672] [2020-07-20 23:05:31,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 23:05:31,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:05:31,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 23:05:31,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:05:31,120 INFO L87 Difference]: Start difference. First operand 469605 states and 700763 transitions. Second operand 5 states. [2020-07-20 23:06:05,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:06:05,799 INFO L93 Difference]: Finished difference Result 939178 states and 1403786 transitions. [2020-07-20 23:06:05,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 23:06:05,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-20 23:06:05,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:06:09,305 INFO L225 Difference]: With dead ends: 939178 [2020-07-20 23:06:09,305 INFO L226 Difference]: Without dead ends: 469605 [2020-07-20 23:06:12,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 23:06:12,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469605 states. [2020-07-20 23:06:48,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469605 to 469605. [2020-07-20 23:06:48,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469605 states. [2020-07-20 23:06:50,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469605 states to 469605 states and 698459 transitions. [2020-07-20 23:06:50,780 INFO L78 Accepts]: Start accepts. Automaton has 469605 states and 698459 transitions. Word has length 255 [2020-07-20 23:06:50,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 23:06:50,780 INFO L479 AbstractCegarLoop]: Abstraction has 469605 states and 698459 transitions. [2020-07-20 23:06:50,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 23:06:50,780 INFO L276 IsEmpty]: Start isEmpty. Operand 469605 states and 698459 transitions. [2020-07-20 23:06:50,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-07-20 23:06:50,781 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 23:06:50,782 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 23:06:50,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:06:50,983 INFO L427 AbstractCegarLoop]: === Iteration 24 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 23:06:50,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 23:06:50,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1711075621, now seen corresponding path program 1 times [2020-07-20 23:06:50,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 23:06:50,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517733718] [2020-07-20 23:06:50,985 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 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 23:06:52,835 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 23:06:52,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 23:06:52,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 1738 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 23:06:52,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 23:06:52,912 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 23:06:52,913 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 23:06:52,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517733718] [2020-07-20 23:06:52,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 23:06:52,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 23:06:52,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288773179] [2020-07-20 23:06:52,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 23:06:52,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 23:06:52,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 23:06:52,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 23:06:52,917 INFO L87 Difference]: Start difference. First operand 469605 states and 698459 transitions. Second operand 5 states. [2020-07-20 23:07:40,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 23:07:40,690 INFO L93 Difference]: Finished difference Result 1036651 states and 1692468 transitions. [2020-07-20 23:07:40,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 23:07:40,691 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 255 [2020-07-20 23:07:40,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 23:08:00,535 INFO L225 Difference]: With dead ends: 1036651 [2020-07-20 23:08:00,536 INFO L226 Difference]: Without dead ends: 567078 [2020-07-20 23:08:05,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 23:08:06,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567078 states.